Which Groups from the Below Options have the s-block Elements?

Q. Which Groups from the Below Options have the s-block Elements?
A. IVA and IIIA.
B. VIIA and VA.
C. IIA and IA.
D. Subgroups of B.
Answer: IIA and IA.

A. IVA and IIIA.
B. VIIA and VA.
C. IIA and IA.
D. Subgroups of B.
Answer: IIA and IA.