MCSA Nursing Students Are Completing Their Module on the Pharmacology

MCSA Nursing students are completing their module on the pharmacology of inflammation, fever and allergies. The students are asked to differentiate between an H-1, and H-2 receptor blocker.
What answer by a student indicates the need for further instruction?

A) H-2 receptors are not used for vertigo or motion sickness.
B) H-2 receptors are usually found in vascular smooth muscle
C) H-1 receptor blockers are frequently ordered for allergy
D) Second generation H-1 blockers have less sedative qualities.