From the following, select the true statement.

Question $1$Answer

a$.$

L$=\{$anbncn $|$ n$<=42\}$ is not context free.

b$.$

If B is context free and A is a subset of B$,$ then A is context free.

c$.$

If A is not context free, then A is also not regular.

d$.$

Intersection of two context free languages is context free.