Read the following statements carefully: [P]: Pyrrole and thiophene undergo electrophilic aromatic substitution reactions much faster than benzene [Q]: Pyrrole and thiophene undergo Diels Alder addition reaction very fast [R]: Pyrrole and thiophene undergo nucleophilic aromatic substitution reaction faster than benzene [S]: Pyrrole is a pie excessive system while thiophene is a pie deficient system Choose the correct combination of statements.