**Question:** Blunting of affect is seen in

A. Depression
B. Anxiety
C. Delirium
D. Hypomania

**Correct Answer:** A. Depression

**Core Concept:** Affect refers to emotions or moods, and blunting of affect is a key feature in psychiatry that helps in clinical diagnosis. In psychiatry, affective disorders are characterized by alterations in emotional expression and responsiveness.

**Why the Correct Answer is Right:** Blunting of affect is a key feature of major depressive disorder (MDD) and is a crucial component in its diagnosis. MDD is characterized by depressed mood, loss of interest or pleasure in activities, and various other symptoms. Blunting of affect refers to a reduction in emotional responsiveness, often seen as a flat or passive emotional expression, which is not attributable to other medical conditions or medications.

**Why Each Wrong Option is Incorrect:**

A. Depression: Although blunting of affect is a key feature of major depressive disorder, it is not the only feature. Other symptoms are required for a diagnosis of depression, such as depressed mood or loss of interest or pleasure.

B. Anxiety: Blunting of affect is not a feature of anxiety disorders, which are characterized by excessive or inappropriate fear, worry, or apprehension.

C. Delirium: Delirium is a psychiatric emergency characterized by acute and fluctuating disturbances in attention, cognition, and awareness. Blunting of affect is not a feature of delirium.

D. Hypomania: Hypomania is a subthreshold condition characterized by elevated, persistent mood, increased energy, and reduced need for sleep. Blunting of affect is not a feature of hypomania.

**Clinical Pearl:** Blunting of affect is a useful clinical sign in identifying mood disorders, particularly major depressive disorder, in a patient presenting with emotional changes. However, it must be used as part of a comprehensive clinical assessment, including other symptoms and exclusion of secondary causes. A thorough history, physical examination, and appropriate investigations are essential to reach a correct diagnosis.