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 is an anti-pseudomonal drug of penicillin class: March 2013 \nSelect and explain. \nA. Nafcillin, B. Dicloxacillin, C. Piperacillin, D. Cloxacillin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C i.e. Piperacillin Extended-spectrum penicillin It is a group of antibiotics that has the widest antibacterial spectrum of all penicillins. It is also called antipseudomonal penicillins. This group includes the Aminopenicillins: Amoxicillin Ampicillin Epicillin - Carboxypenicillins: Ticarcillin Carbenicillin Ureidopinicillin Azlocillin Mezlocillin Piperacillin - Mecillinam', 'role': 'assistant'}]