The `pK_a` value of (I) is less than the `pK_a` value to (II).
Nonaromatic compounds are more stable than anti-aromatic compounds.

Options

A. If both (A) and ( R) are true and ( R) is the correct explanation of (A).
B. If both (A) and ( R) are true but ( R) is not correct explanation of (A).
C. If (A) is true but ( R) is false.
D. If (A) is false but ( R) if true.

Answer

A

Explanation

(a) Conjugate base of `(I)` and `(II)` are :

Stability and acidic order : aromatic gt nonaromatic gt anti-aromatic.
`(I)` is stronger acid than `(II)`, hence `(I)` has lower `pK_a`.