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: Biochemistry
Inhibition of protein synthesis in translation phase is: due to 
Select and explain. 
A. Isoniazide, B. Ethambutol, C. Methotrexate, D. Cycloserine
A: Isoniazide
Answer: A: Isoniazide 
Explanation: None