Assertion `B_(2)` molecule is diamagnetic
Reasoning The highest occupied molecular orbital is of sigma type .

Options

A. If both `(A)` and `(R )` are correct and `(R )` is the correct explanation of `(A)`
B. If both `(A)` and `(R )` are correct and `(R )` is the correct explanation of `(A)`
C. If `(A)` is correct but `(R )` is incorrect
D. If both `(A) and `(R )` are incorrect

Explanation

Correct `(A) B_(2)` molecule is paramagnetic as shown by its molecular orbital electronic configuration as
`KK^(**) (sigma^(**)2s^(2)) (pi 2p_(x)^(1),pip_(y)^(1))`
Correct `(R )` Thev highest occupied `MO` is `pi` and not sigma type .