A compóund A with molecular formula `C_4 H_10O`. on oxidation forms compound B. The compound B gives positive iodoform test. Compound B on reaction with `CH_3 MgBr` followed:by hydrolysis gives: C. Identify A, Band C and give the sequence of reactions.

Explanation

Since B gives positive iodoform test. It must be a methyl Ketone. It has 4 carbon atoms. Hence B can be `CH_3 COCH_2 CH_3`
FIGURE
`B div CH_3-C-CH_2 CH_3` butanone
B can be obtained by the oxidation of A Butonone can be obtained by the oxidation of 2 butanol.
Butanone on reaction with `CH_3 MgBr`
FIGURE