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': "Medium used to isolate M. tuberculosis contains all except ? \nSelect and explain. \nA. Malachite green, B. Hen's egg, C. Bromothymol blue, D. Glycerol", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Bromothymol blue Lowenstein-Jensen Medium (LT medium)LJ medium consists of mineral salts, asparagine, glycerol, malachite green and hen's egg.The malachite green prevents the growth of other microorganism on medium.It is used as a primary isolation medium for mycobacteria.Mineral salts are monopotassium phosphate, magnesium or sodium citrate and magnesium sulphate", 'role': 'assistant'}]