This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycobacterial Diseases (TB, Leprosy and MAC), Subject name: Pharmacology
Which of the following anti-tubercular drug should be avoided in pregnancy? 
Select and explain. 
A. Rifampicin, B. INH, C. Pyrazinamide, D. Ethambutol
C: Pyrazinamide
Answer: C: Pyrazinamide 
Explanation: - Streptomycin is contra-indicated in pregnancy. - Pyrazinamide should be avoided in pregnancy.