The correct option is C Throat
Diphtheria is an infectious disease and is caused by Corynebacterium diphtheriae. The symptoms of diphtheria include suffocation, swollen lymph nodes in the neck, chills, fever, loud cough, bluish skin, difficulty in breathing, etc. The bacteria live in the mouth, throat, and nose of an infected person and can be passed to others by coughing or sneezing. So, the correct answer is option B.