This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Specific Infections, Subject name: Gynaecology & Obstetrics
Drug of choice in pregnant women with Secondary Syphilis is? 
Select and explain. 
A. Doxycycline, B. Benzathine Penicillin, C. Ceftriaxone, D. Cotrimoxazole
B: Benzathine Penicillin
Answer: B: Benzathine Penicillin 
Explanation: Ans. (b) Benzathine PenicillinRef: Danforth's Obstetrics and Gynecology, lOthed p 613