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: Medicine
The principal use of ethosuximide is in: 
Select and explain. 
A. Focal onset seizure, B. Alcohol withdrawal seizure, C. Absence seizure, D. Atypical absence seizure
C: Absence seizure
Answer: C: Absence seizure 
Explanation: Ethosuximide is mainly indicated for absence seizure. Ref: Harrisons principles of internal medicine, 18th edition, Page 3263, Table: 369/9.