1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
In an isocyanide, first an electrophile and then a nucleophile is added to the carbon to form a species which undergoes further transformation
\(\mathop {{\text{R - }}\mathop {\text{N}}\limits^{\text{ + }} \equiv {{\text{C}}^{\text{ - }}}}\limits_{{\text{ alkylisocyanide }}} {\text{ + }}{{\text{H}}_{\text{2}}}{\text{O}} \to {\text{RN = CHOH}} \to \)
\(\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\mathop {{\text{RNHCHO}}}\limits_{{\text{ Alkyl}}\,\,{\text{formamide }}} \)
Hence, in the above reaction, carbon first acts as a nucleophile and then, acts as a electrophile.
