A) \[_{6}^{12}C\]and\[_{6}^{14}C\]
B) Carbon dioxide and carbon monoxide
C) Diamond and graphite
D) \[{{C}_{2}}{{H}_{4}}\]and\[{{C}_{3}}{{H}_{6}}\]
Correct Answer: A
Solution :
Isotopes are the atoms of the same element which have different mass numbers.\[_{6}^{12}C\] and \[_{6}^{14}C\]are isotopes of carbon.
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