The answer to this should be B.
From the first condition n can be 3,4,5 (3,5 odd) So not useful
From the second condition n can be 3,4 (4 even) Definite Answer
Yes guys 'B' is the OA.
Neat explanation skumar.raman.
My approach was the same. But there is one moment.
Does 'n' must be the same in 1) and 2) = 180 or it must be different?
180/36=5 odd number.
180/45=4 even number.
In both cases the n=180
In this case the answer is 'C'.