<prompt> Which of the following is gram negative diplococci:Cornynebacterium DiphtheriaeNeisseria MeningitidisStreptococcus pneumoniaeStaphylococcus  <response>: Ans. b Neisseria MeningitidisRef: Microbiology by Ananthanarayan and Paniker 8th ed. 224-25MENINGOCOCCI Meningococci are Gram negative diplococci Strep. Pneumoniae is a gram positive diplococci. Corynebacterium Diphtheriae is Gram positive bacillus. They are non-motile, non-sporing and non-acid fast. Staphylococcus are Gram positive cocci. They are also non-motile, non-spore forming, non-acid fast. 