This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
An infant of 5 months presents with sudden dropping of head and flexion of arms. On examination, infant has hypopigmented macule on trunk. What is the drug of choice for this condition 
Select and explain. 
A. Vigabatrin, B. Sodium Valproate, C. Ethosuccimide, D. ACTH
A: Vigabatrin
Answer: A: Vigabatrin 
Explanation: Sudden dropping of head and flexion of arms ⇒ Salam spells
It is seen in west syndrome.
Hypopigmented macules on trunk ⇒ Tuberous sclerosis
Drug of choice:
a) West syndrome ⇒ ACTH
b) West syndrome + Tuberous Sclerosis ⇒ Vigabatrin