Arrange the following in the increasing order of recativity with `NH_(3)`
(I) `CH_(2) O`
(II) `CH_(3) CHO`
(III) `CH_(3) - CO - Ch_(3)`
(IV) `(I) CH_(2

Options

A. I `lt` II `lt` III `lt` IV
B. III `lt` IV `lt` I `lt` II
C. IV `lt` III `lt` II `lt` I
D. II `lt` I `lt` IV `lt` III

Answer

C

Explanation

Reactivity follows the ease with which a nucleophile can attack at carbonyl carbon. Greater the steric hindrance at carbonyl carbon, smaller is the reactivity.