Consider the following sequence of reactions, in which compound D has the formula $$\text{C}_3\text{H}_9\text{N}$$ and compound E has the formula $$\text{C}_3\text{H}_8\text{O}$$. The functional groups undergoing change in the conversion of A to E respectively are

A

$$-\text{COOH}$$, $$-\text{NC}$$, $$-\text{CONH}_2$$, $$-\text{NH}_2$$, $$-\text{CH}_2\text{OH}$$

B

$$-\text{COOH}$$, $$-\text{CN}$$, $$-\text{CONH}_2$$, $$-\text{NH}_2$$, $$-\text{CH}_2\text{OH}$$

C

$$-\text{COOH}$$, $$-\text{CONH}_2$$, $$-\text{CN}$$, $$-\text{CH}_2\text{NH}_2$$, $$-\text{CH}_2\text{OH}$$

D

$$-\text{CONH}_2$$, $$-\text{COOH}$$, $$-\text{NC}$$, $$-\text{NHR}$$, $$> \text{CHOH}$$