Which of the following carbonyl compounds gives both Fehling's test and iodoform test?

The major product of the following reaction sequence is

Which of the following is the Wolff-Kishner reduction?

Aldol condensation of acetaldehyde involves the formation of which of the following intermediates?

How many total oximes are possible for ketones having molecular formula $C_3H_6O$,$C_4H_8O$ and $C_5H_{10}O$?

Compound $(A)$ with molecular formula $C_6H_{12}O$ is optically active. Compound $(A)$ gives a negative Tollens test and a positive test with $2,4$-dinitrophenylhydrazine. Identify $(A)$.