The correct order of reactivity of $$-\text{CHO}$$, $$-\text{COR}$$, $$-\text{COOR}$$ and $$-\text{CONR}_2$$ groups toward MeMgI in ether is

A

$$-\text{CONR}_2 > -\text{COOR} > -\text{COR} > -\text{CHO}$$

B

$$-\text{CHO} > -\text{COR} > -\text{COOR} > -\text{CONR}_2$$

C

$$-\text{CONR}_2 > -\text{CHO} > -\text{COR} > -\text{COOR}$$

D

$$-\text{CHO} > -\text{CONR}_2 > -\text{COOR} > -\text{COR}$$