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A pair of isotopes is...

A pair of isotopes is

A

`._(6)C^(14)` and `._(7)N^(13)`

B

`._(7)N^(13)` and `._(7)N^(14)`

C

`._(6)C^(14)` and `._(7)N^(14)`

D

`._(6)C^(14)` and `._(8)O^(16)`

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The correct Answer is:
B
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