**Question:** Not a feature of mania

A. Increased appetite
B. Insomnia
C. Grandiosity
D. Irritability

**Core Concept:** Mania is a key feature of bipolar disorder, specifically manic episodes. It is characterized by a specific set of symptoms that include elevated mood, increased energy, and several other manifestations.

**Why the Correct Answer is Right:** The correct answer, D. Irritability, is not a typical symptom of mania. Irritability is more commonly seen in depression or as a side effect of certain medications or substances. In contrast, mania is characterized by increased energy, grandiosity, and decreased need for sleep (insomnia is a wrong answer).

**Why Each Wrong Option is Incorrect:**

1. **Option A (Increased appetite):** While weight gain can be a consequence of mania, increased appetite is not a defining feature.
2. **Option B (Insomnia):** Contrary to the correct answer, insomnia is a common feature of mania, reflecting increased energy and restlessness.
3. **Option C (Grandiosity):** Grandiosity is a critical component of mania, characterized by inflated self-esteem and delusional thinking.

**Clinical Pearl:** Irritability in manic episodes may be mistaken for anger or aggression, which can lead to misunderstandings and potential conflicts. It is essential for healthcare professionals to understand the nuances of manic symptoms for accurate diagnosis and treatment planning.

**Correct Answer:** D. Irritability