A) \[_{1}^{2}{{H}^{+}}\] and \[_{1}^{3}H\]
B) \[_{1}^{3}H\] and \[_{2}^{4}{{H}^{-}}\]
C) \[_{2}^{3}He\] and \[_{2}^{4}He\]
D) \[_{6}^{12}C\] and \[_{7}^{14}{{N}^{+}}\]
Correct Answer: A
Solution :
Isotopes have same atomic number but different mass number.
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