Two statements 'A' and 'R' are given below Select your answers to these items using the codes given below:
Assertio (A) : Among the cobalt (III) complexes `[Co(NH_(3))_(6)]^(3+)` is a diamagnetic but `[CoF_(6)]^(3-)` is paramagnetic.
Reason (R) : Hybridisation of `[Co(NH_(3))_(6)]^(3+)` is `sp^(3)d^(2)` where as hybridisation of `Co` in `[CoF_(6)]^(3-)` is `d^(2)sp^(3)`.

Options

A. Both A and R are correct and R is the correct explanation of A
B. Both A and R are correct and R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

Answer

3

Explanation

`[Co(NH_(3))_(6)]^(3+) : d^(2)sp^(3), CoF_(6)^(3-) : sp^(3)d^(2)`