**Core Concept**
The question pertains to the formation of a membrane in the throat, which is a clinical manifestation of certain infectious diseases. This **diphtherial membrane** is a pseudomembrane composed of dead cells, bacteria, and fibrin.

**Why the Correct Answer is Right**
Given the context, the correct answer should be an option that does not typically cause a membrane in the throat. Diphtheria, caused by **Corynebacterium diphtheriae**, is the classic example of a disease that forms such a membrane.

**Why Each Wrong Option is Incorrect**
**Option A:** Diphtheria is known for causing a throat membrane.
**Option B:** Certain bacterial infections can lead to membrane formation.
**Option C:** Infections like streptococcal pharyngitis might have a pseudomembrane.

**Clinical Pearl / High-Yield Fact**
Remember, the **diphtherial membrane** is a key diagnostic feature of diphtheria.

**Correct Answer:** D. Influenza.