In the fluid catalytic cracker (FCC), the cracking reaction is _____________ (i) and the regeneration is _______________ (ii) _______________?
(A) (i) exothermic (ii) endothermic
(B) (i) exothermic (ii) exothermic
(C) (i) endothermic (ii) endothermic
(D) (i) endothermic (ii) exothermic

