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
[{'content': 'Which of the following drug acts against Pseudomonas - \nSelect and explain. \nA. Piperacillin, B. Methicillin, C. Nafcillin, D. Cloxacillin', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Piperacillin Drugs acting against Pseudomonas. o Penicillins- Piperacillin, Carbenicillin, Ticarcillin, Mezlocillin. o Cephalosporins - Ceftazidime, Cefoperazone, Cefepime. o Carbapenems- Imipenem, meropenem o Monobactams - Aztreonam. o Aminoglycosides - Tobramycin, Gentamycin, Amikacin. o Fluroquinolones - Ciprofloxacin, Levofloxacin, Norfloxacin.. o Other - Polymixin B, Colistin.", 'role': 'assistant'}]