A neutron moving with speed V makes a head on collision with a hydrogen atom in ground state kept at a rest. Then find the minimum kinetic energy of neutron for which inelastic (completely of partially ) collision may take place . (mass of neutron =mass of hydrogen =$\;1.67\times10^{-27} Kg$) .

Question

$(a)\;17.2 eV \qquad(b)\;20.4 eV\qquad(c)\;19.6 eV\qquad(d)\;12 eV$