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: Pharmacology
Combination of Doxylamine + ______ is considered as safest antiemetic drug in pregnancy 
Select and explain. 
A. Palonosetron, B. Pyridoxine, C. Aprepitant, D. Domperidone
B: Pyridoxine
Answer: B: Pyridoxine 
Explanation: Doxylamine (antihistamine) with Pyridoxine (vitamin B6) is considered as safest antiemetic drug in pregnancy.