Question: In carbon-based NMR, why does only the C-13 isotope create a signal? Question 7 options: Carbon 13 is the most common radioactive isotope of carbon,

In carbon-based NMR, why does only the C-13 isotope create a signal?

Question 7 options:

Carbon 13 is the most common radioactive isotope of carbon, thus giving a signal when subjected to radio wave radiation

Carbon 13 is heavier than Carbon 12, and present in much higher quantity than Carbon 14

The unpaired neutron in C-13 produces spin

This is not true, all carbon isotopes produce NMR signals

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