1.

Assertion (A) :Nuclear isomers have same atomic number and same mass number but with different radioactive properties. Reason (R) : U_((A)) and U_((Z)) are nuclear isomers.

Answer»

If both `(A)` and `(R)` are CORRECT , and `(R)` is the correct EXPLANATION of `(A)`
If both `(A)` and `(R)` are correct, but (R) is not the correct explanation of `(A)`
If `(A)` is correct, but `(R)` is incorrect.

Answer :A


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