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: Gynaecology & Obstetrics
Combination of Nifedipine with what other tocolytic agent can potentially cause dangerous neuromuscular blockade. 
Select and explain. 
A. Terbutaline, B. Magsulf, C. Indomethacin, D. Atosiban
B: Magsulf
Answer: B: Magsulf 
Explanation: Magnesium sulphate when used with nifedipine can cause neuromuscullar blockade that can interfere with pulmonary and cardiac function.