Assertion: During de-excitation from n=6 to n=3 , total six emission lines may be obtained.
Reason: From `n=n to n =1 total (n(n-1)/(2)` emission lines are obtained.

Options

A. If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.
B. If both Assertion and Reason or true but Reason is not the correct explanation of Assertion.
C. If Assertion is true, but the Reason is false.
D. If Assertion is false but the Reason is true.

Answer

A, B

Explanation

Let us take n=3 as N=1. Then, n=6 means
N=4.
So, total number of emission lines between N =1
and N =4 are
`(N(N-1)/(2)) = (4xx3)/(2) =6.`