Please type the correct option number as the answer
Note-It is combustion not combution (spelling mistake :P)
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@Matin Naseri , @MOHD NAIM MOHD AMIN , @Corina Margareta Cristian , @Rohan Patila , @Marc Fernández , how can only 1 be the answer ?? In option 2 the strain on the bridgehead carbons is very high compared to the spiro compound where there is strain on only 1 carbon atom. Then why 2 isn't the answer ??