In the given reaction: $CH_3-CH(CH_3)-CO-CH_2-CH_3 \xrightarrow{CF_3COOOH} [X]$ as the main product. $[X]$ will be:

Benzene on reaction with $A$ forms acetophenone,which on reaction with $B$ forms ethylbenzene. $A$ and $B$ are:

The product formed from the following reaction sequence is :

In the following reactions,products $A$ and $B$ are

What type of product is obtained when formaldehyde reacts with $CH_3MgBr$ in dry ether?

$(A)$ $\xrightarrow{NH_2OH} (B)$ $\xrightarrow{H_2SO_4} (C)$ $\xrightarrow{H_3O^{\oplus}} (D) + (E)$ $\xrightarrow{CHCl_3, KOH} CH_3-NC$ (carbylamine test). $(D)$ $\xrightarrow{SOCl_2} (F)$ $\xrightarrow{(i) PhMgBr \text{ (excess) } (ii) H^{\oplus}} (G)$ $\xrightarrow[\Delta]{H^{\oplus}} (H)$ $\xrightarrow{CH_2I_2, Zn/Cu} \text{1,1-diphenylcyclopropane}$. The molecular weight of compound $(A)$ is: