This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Risk of the damage to fetus by maternal rubella is maximum if mother gets infected in: 
Select and explain. 
A. 6 - 12 weeks of pregnancy, B. 20 - 24 weeks of pregnancy, C. 24 - 28 weeks of pregnancy, D. 32 - 36 weeks of pregnancy
A: 6 - 12 weeks of pregnancy
Answer: A: 6 - 12 weeks of pregnancy 
Explanation: Ans. is 'a' i.e., 6 - 12 weeks of pregnancyIn the first trimester, 80% of the infants would be affected, and severity of the disease depends on how early the infection occurs.