Which amongst the following reactions of alkyl halides produces isonitrile as a major product?

(A) $$\mathrm{R-X+HCN\to}$$

(B) $$\mathrm{R-X+AgCN\to}$$

(C) $$\mathrm{R-X+KCN\to}$$

(D) $$\mathrm{R-X+NaCN\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{{C_2}{H_5}OH}^{{H_2}O}}}$$

Choose the most appropriate answer from the options given below:

Choose the correct sequence of reagents in the conversion of 4-nitrotoluene to 2-bromotoluene.

Identify the product in the following reaction

Identify 'X' in the following reaction.