Choose the Incorrect statement from the following

Statement (a) is correct. The  ${ }_2{\text{He}}^4$   nucleus (or the $\alpha$ -particle) is exceptionally stable and  has  a much higher value of BE per nucleon than that for most other light-nuclei.
Statement (b) is correct but the reason of decrease in binding energy in different for the cases  of small and  larger value of A. The reason for the decrease in the BE per nucleon for nuclei  with large A is that with an increase in the number of protons, the coulomb repulsion  increases. On the other hand, the decrease in the BE per nucleon for nuclei with small A is  due to a surface effect the nucleons at the surface being less strongly bound than those in the  interior.
Statement (c) is also correct. The energy reguired to remove one neutron (i.e., one nucleon) is  the same as deference in  binding energy
Statement (d) is incorrect. To enesure both charge and mass number conservation, a proton  must be produced as a by-product of the reaction.  ${ }_{\text{t}}{\text{D}}^2{+}_{\text{t}}{\text{D}}^2{\to }_{\text{t}}{\text{T}}^3{+}_{\text{t}}{\text{P}}^{\text{t}}+\text{Q}$