Question

which isotopes of carbon are naturally occurring? carbon-13 and carbon-14 carbon-11 and carbon-12 carbon-12 and carbon-13 carbon-14 and carbon-15

Explanation:

Carbon - 12 and Carbon - 13 are the two most abundant naturally - occurring isotopes of carbon. Carbon - 14 is also naturally occurring in trace amounts as a result of cosmic ray interactions in the atmosphere.

Answer:

C. Carbon - 12 and Carbon - 13