Some laws/processes are given in column-I. Match these with the physical phenomena given in column-II.
`{:(,"Column I",,"Column II"),((A),"Nuclear fusion",(p),"Converts some matter in energy"),((B),"Nuclear fission",(q),"Generally possible for nuclei with low aoimic number".),((C),beta-"decay",(r),"Generally possible for nuclei with high. atomic no".),((D),"Exothermic nuclear reaction",(s),"essentially proceeds by weak nuclear forces".):}`

Answer

(A) P,Q ; (B) P,R ; (C ) S,P ; (D) P,Q,R