Using the binding energy versus nucleon number, is this a high amount of binding energy per nucleon?

By using the binding energy versus nucleon number, The maximum binding energy per nucleon occurs at around mass number A = 50, which corresponds to the most stable nuclei. In addition, nuclei with a small mass number have a small binding energy per nucleon. However, if the mass number increases, the binding energy per nucleon increases too.

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.

i believe the answer is a