1.

An element A decays into element C by a two-step process : \[A\to B+{{\ }_{2}}H{{e}^{4}}\]\[B\to C+\ 2{{e}^{-}}\] Then  [CBSE PMT 1994; AMU 2002; KCET 2003]

A.            A and C are isotopes         
B.            A and C are isobars
C.            A and B are isotopes         
D.            A and B are isobars
Answer» B.            A and C are isobars


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