1.

Assertion :(A):The average life of radioactive element is infinity. Reason (R): As a radioactive element disintegrates, more of it is formed in nature by itself.

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.
If `(A)` is incorrect, but `(R)` is correct.

Solution :The COMPLETE disintegration of any RADIOACTIVE material is not possible.


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