in this question i know dibal h will reduce and form alcohol at 1 end so either option a or b is answer but i know dibal h reduces cooh so it must be b but answer is a why is not reducing this cooh too?

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms Using above informationMatch the following

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What are the chapters we need to study before alcohols, phenols and ethers to understand it ?

Plz answer this query.....................................................................................................

how to represent the possible fischer projections for 2-bromohexane