This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pharmacology
[{'content': 'Which of the following is a 2nd generation antihistaminic? \nSelect and explain. \nA. Fexofenadine, B. Dimenhydrinate, C. Promethazine, D. Pheneramine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Fexofenadine, Loratidine, Cetrizine, Astemizole, Azelastine etc are 2nd gen antihistaminic drugs -less sedativeRef: KD.Tripati 6th ed.Pg 158', 'role': 'assistant'}]