As the mass number A increases, the binding energy per nucleon in a nucleus

The graph of ln(R/R₀) vs ln A (R=radius of nucleus and A=its mass number) is

Two protons are kept at a separation of 10nm.Let Fn and Fe be the nuclear force and electromagnetic force between them.

Which of the following the wrong description of the binding energy of the nucleus?

In a radioactive decay, neither the atomic number nor the mass number changes. Which of the following particles is emitted in the decay?