This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
Erenumab was approved by FDA in 2018 for 
Select and explain. 
A. Phenylketonuria, B. Migraine, C. Hypeension, D. Glycogen storage disorders
B: Migraine
Answer: B: Migraine 
Explanation: Erenumab belongs to a new class of drugs known as selective calcitonin gene-related peptide (CGRP) antagonists, which are used for the treatment of acute migraine attacks.