Assertion :- In Meselson and Stahl experiment `""^(15)NH_(4)Cl` can be separated from `""^(14)N ` by radiography.
Reason : In `""^(15)NH_(4)Cl,""^(15)N` is a radioactive istope.
A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is Flase.
D. If both Assertion & Reason are false.