if iodomethane is subjected to corey house reaction with iodomethyl cyclopentane being added in the final step, can ring expansion of cyclopentyl carbocation occur resulting finally in the product methyl cyclohexane ??

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane