which of the following best represents a pair of isotopes?\ncarbon-12 and oxygen-12\ncarbon-12 and…

which of the following best represents a pair of isotopes?\ncarbon-12 and oxygen-12\ncarbon-12 and $^{24}_{14}mg$\ncarbon-12 and carbon-14\n$^{6}_{12}x$ and $^{12}_{6}x$
Answer
Brief Explanations:
Isotopes are atoms of the same element with different mass - numbers due to different numbers of neutrons. Carbon - 12 and Carbon - 14 are both carbon atoms with mass numbers 12 and 14 respectively. The other pairs involve different elements or incorrect notations.
Answer:
Carbon-12 and Carbon-14