<prompt> Medium used to isolate M. tuberculosis contains all except ?Malachite greenHens eggBromothymol blueGlycerol  <response>: Ans. is c i.e., Bromothymol blue Lowenstein-Jensen Medium LT mediumLJ medium consists of mineral salts, asparagine, glycerol, malachite green and hens 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 