This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': "Investigation of choice of diphtheria carrier is \nSelect and explain. \nA. Throat Swab Culture, B. Gram's stain, C. Albe's stain, D. Zeil Nelson's stain", 'role': 'user'}, {'content': "Answer: A \nExplanation: One or two swabs from the lesions are collected under vision, using a tongue depressor. Smears stained with methylene blue or one of the special stains (Neisser's or Albes) will show the bacilli with metachromatic granules and in the typical arrangement. Reference: Textbook of Microbiology; Anathanarayan and panicker's; 10th edition; Page no: 242", 'role': 'assistant'}]