(A) Nitrobenzene undergoes Friedel-Craft reaction.
(R) Friedel-Crafts reaction is an electrophilic substitution reaction.
A. If both A and R are correct and R is the correct explanation of A.
B. If both A and R are correct and R is not the correct explanation of A.
C. If A is the correct but R is incorect.
D. If A is the incorrect but R is corect.
