Who is sitting where?

i) Now, as F & B will be together anywhere thus C have only choice to sit with G.

ii) "A sits on bench I with his best FRIENDS" means along with 2 other students.....so on 1st bench there are 3 students.

iii) Here, E, F & G are definitely male thus, there can be 3 or 4 girls among these 7 students.

Because C is not in a group with A, E, D and F is only in a group with B. $\Rightarrow$ C is in a group with G $\Rightarrow ans = \boxed{GBenchI34}$

1st and 3rd occupied,so B&F can sit in 2nd bench.So that leaves C to sit with G in the 3rd bench(as C can't sit with A in the 1st bench). So A,E,D sits in the first bench. From the statement A,E,F are boys so girl cane be 3 or 4.(A is a boy bcoz A takes 'he' as personal pronoun).

I only answer 1st question because there is only one answer that start with G :)

question 1: -C not sit with A, E and D. -possible student sit with C is B, F and G -since F only sit with B mean only G possible student sit with C

Again by giving the choice and providing 4 distinct answers to question 1 the matter is simplified. So let's work on question 1. Choice 1 and 3 are not possible because it clearly says that C does not sit with E or D. She can't sit with B because F is sitting with her. So this only leaves G, thus option 4 is correct.
Now we can see if other conditions fit or not.
As A is sitting with his "friends" so that is the bench where 3 people are sitting.
Now let's count the girls.
A Not girl ('his' friends)
B Girl (F is a boy so G must be a girl)
C Girl (mentioned)
D Girl (A and E both are boys)
E Not girl (mentioned)
F Not girl (mentioned)
G Not sure.
So that means there are 3 or 4 girls thus the answer to question 3 is also correct. But in order to "select" the right answer we did not need to do all these calculations.

A sits on bench I with his best friendS -> bench I has 3 students, leaving us with only the second option to choose.

the question said that the boy A sits on bench one and sit his best friends. Because it is said 'best friends' not 'best friend', so bench with three students is Bench One. It is said that F is only sitting with B, and C doesn't sit with A,E and D, so C will sit with G. Usually, boys will sit with boys, and girls will sit with girls, so, A, E and D are boys, so there are probably 3 or 4 Girls.

1) "C who is a girl student does not sit with A, E, and D."

C-girl, doesn't sit with AED, may sit with BFG

2) "The boy student F sits only with B."

F-boy, sits ONLY with B

B-girl (since there must be at least one girl on every bench), sits ONLY with F

C-sits with G, as that's the only option left.

3) "A sits on bench I with his best friends."

A-boy, sitting with multiple people (AED sitting on Bench I)

C-sits ONLY with G

4) "G sits on bench III."

G and C-sit on bench III

5) "E is the brother of C."

E-boy

Therefore, A (boy), D (girl) and E (boy) sitting on Bench I; B (girl) and F (boy) sitting on Bench II; C (girl) and G (either) sitting on Bench III. So, the answers in order are G, I, 3 or 4.

a is a boy, b is unknown , c is a girl, d is unknown, e is a boy, f is a boy, g is unknown. For the first question , who sits with c, f and b are out, then a, e and d are out. The only remaining person is g so c sits with g. If you look at the answer choices, there is only one choice with c and g so you don't have to figure out the others. Done.

so boys are at least A, E, and F. A sits with multiple people (implied by his best friendS), so bench I has three people. Since C will not sit with A, E, and D, and F and B are together, only G is left to sit with C. Also since there are at least three girls and three boys and G's gender is never mentioned, there are 3 or 4 girls as G could be either gender.

I Just used the clue A sits with his best 'friends',so answer question 2 was bench I,there was only one option having only bench I,so I got the answer G,bench I and 3 or 4

Inputs: A B C D E F G Conditions: C -girl C not with A,E,D F -boy F wtih B E brother of C

Possibilities: I - A,E,D II - F,B III - C,G

C doesn't sit with A, E and D. C can't be her own partner. So only B and G can sit with C. But F can sit only with B. So C sits with G.

Since there is only one option that says "G", I didn't bother solving the rest. :P

"A sits on bench I with his best FRIENDS" meaning that bench I has the triplet. This solves the problem.(the mistake of option setter) ;-)

https://imgur.com/x0lAkgO

Table 1 : A, E, D Table 2: B, F Table 3: C, G

easy one ..First out AED then f And B the remaining one is G that will sit with C...and the fourth option you will find the G answer and obviously if A is sitting with his friends then there must be more that 1 frnd..so its No 1 seat whre three person will sit.. now everybody can guess the last answer..:)