Assertion :Bothe `Cu^(+)` and` Na^(+)`have almost same radil.
Reason :`Cu^(+)` possesses more power to polarise an anion.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer

b

Explanation

The more power of `Cu^(+)` to polarize an anion is due to its pseudo noble gas strucure
`r_(Cu+) = 0.96 A : r_(Na^(+) ) = 0.95 A`