$Methyl$ chloride reacts with silver acetate to yield:

Given below are two statements:
Statement-$I$: High concentration of strong nucleophilic reagent with secondary alkyl halides which do not have bulky substituents will follow $S_{N}2$ mechanism.
Statement-$II$: $A$ secondary alkyl halide when treated with a large excess of ethanol follows $S_{N}1$ mechanism.
In the light of the above statements,choose the most appropriate from the options given below:

The major product of the following reaction is:

Which of the following is product $A$ in the above reaction?

Consider the following bromides. What is the correct order of $S_N1$ reactivity?

Identify $A$ in the following reaction: