In the following Reimer-Tieman Reaction, the product(s) is (are) (JEE ADVANCED 2013)

Ans key :[2 (Q) and 4 (S)]

Wolf-Kishner reduction: Reduction of carbonyl into alkane with hydrazine in high boiling solvent such as glycol .

This reaction is not preferred when base sensitive groups like halogens  or bulky groups are present.