Q. and are isotopes, and are isobars. All three are radioactive :

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A

A, Band C must belong to the same element

B

A, Band C may belong to the same element

C

It is possible that A will change to B through a radioactive decay process

D

It is possible that B will change to C through a radioactive decay process

Solution:

As and are isotopes, these will have same atomic number and belong to same element. and are isobars so these will have same mass numbers but different atomic numbers so these will be different elements. By a radioactive process of alpha or beta decay atomic number always changes so can change to by any of these processes.

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