A child presents with fever and Lymphadenopathy. On examination a grey membrane can be seen over Left tonsil. Which of the following media is used for definitive diagnosis of organism?
For early diagnosis of C.diphtheria - Loffler's serum slope
For defenitive diagnosis - Potassium tellurite agar.
Loffler's serum slope
Potassium tellurite agar
Chocolate agar
Tinsdale agar