Identify 'A' in the following reaction : 

CONCEPT:

Wolff-Kishner Reduction

• The Wolff-Kishner reduction is a chemical reaction that reduces a carbonyl group (C=O) to a methylene group (-CH2-).
• The reaction involves the conversion of a ketone or aldehyde to a hydrazone using hydrazine (N2H4), followed by the removal of nitrogen (N2) under basic conditions (KOH and ethylene glycol).
• This reaction effectively removes the oxygen atom from the carbonyl group, converting it into an alkane.

Explanation:-

• Step 1: The carbonyl compound (ketone) reacts with hydrazine (N2H4) to form a hydrazone intermediate.
• Step 2: The hydrazone is treated with a strong base (KOH) in ethylene glycol, resulting in the removal of nitrogen gas and formation of an alkane.
• The given compound undergoes Wolff-Kishner reduction, where the ketone is reduced to the corresponding alkane.

Conclusion:-

• The correct product 'A' is n-butane, which corresponds to option 2: CH3-CH2-CH2-CH3.