$A$ solution of methyl amine:

The reaction of $CH_3NH_2$ with $CH_3MgX$ yields ...........

How many molecules of methyl iodide are required to obtain tetramethyl ammonium iodide from dimethyl amine?

The major products $A$ and $B$ formed in the following reaction sequence are :

The major product in the following reaction is:

The correct order of base strength in benzene as a solvent for the given amines is:
$I: CH_3CH_2NH_2$
$II: (CH_3CH_2)_2NH$
$III: (CH_3CH_2)_3N$