From the binding energy per nucleon versus mass number curve:

(A) B.E/nucleon is small for light nuclei like ${}_1^1H, {}_1^2H, {}_1^3H$
(B) B.E/nucleon decreases in heavy nuclei making them less stable stab.
(C) When two light nuclei combine to form heavy nucleus, energy is absorbed.
(D) Heavy nucleus splits into lighter nuclei which results in liberation of energy.

Choose the correct answer from the options given below:

(A), (B), (D) only

The correct answer is Option (4) → (A), (B), (D) only

(A) Binding energy nucleon is small for light nuclei ${}^1H, {}^2H$ and ${}^3H$ as light nuclei have low binding energy per nucleon.

(B) After reaching a maximum level around Fe, the binding energy per nucleon decreases in heavier metal.

(D) When heavy nuclei undergo fission, they split into lighter nuclei, releasing energy due to the decrease in binding energy per nucleon.