How does the binding energy per nucleon vary with the increase

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How does the binding energy per nucleon vary with the increase in the number of nucleons?

1. Increases continuously with mass number
2. Decreases continuously with mass number
3. First decreases and then increases with increase in mass number
4. First increases and then decreases with increase in mass number

Correct Option: D

From the graph of BE/A versus mass number A it is clear that, BE/A first increases and then decreases with increase in mass number.