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
Investigation of choice of diptheria carrier is : 
Select and explain. 
A. Throat swab culture, B. Gram’s stain, C. Albert’s stain, D. Zeil Nelson’s stain
A: Throat swab culture
Answer: A: Throat swab culture 
Explanation: • Carriers can be detected only by the cultural method. 
•The swab should be taken from both the nose and throat