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: Microbiology
[{'content': 'Agent which on addition to a colony inhibits its growth and on removal the colony regrows is \nSelect and explain. \nA. Bacteriostatic, B. Bactericidal, C. Antibiotic, D. Antiseptic', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Bacteriostatic Bacteriostatic . Agent is able to inhibit bacterial multiplication. . Multiplication resumes upon removal of agent. Bactericidal . Agent is able to kill the bacteria. . Action is irreversible ie, the killed organism can no longer reproduce, even after being removed from contact with the agent.", 'role': 'assistant'}]