Atoms and Nuclei

A heavy nucleus N, at rest, undergoes fission N→P+Q, where P and Q are two lighter nuclei. Let δ=MN−MP−MQ where MPMQ and MN are the masses of P,Q and N, respectively. EP and EQ are the kinetic energies of P and Q, respectively. The speeds of P and Q are vP and vQ respectively. If c is the speed of light, which of the following statement(s) is(are) correct ?