Suicidal risk is common with which type of depression -a) Reactive depressionb) Endogenous depressionc) Childhood depressiond) Depression in involution

**Core Concept**
The question tests the understanding of different types of depression and their association with suicidal risk. **Depression** is a mood disorder characterized by persistent feelings of sadness, hopelessness, and a lack of interest in activities. **Suicidal risk** is a critical concern in mental health, and certain types of depression are more closely linked to this risk.

**Why the Correct Answer is Right**
**Endogenous depression** is a type of depression that is thought to arise from within the body, often without a clear external cause. It is characterized by a persistent feeling of sadness, guilt, or worthlessness, and is more likely to be associated with **suicidal ideation**. This is because endogenous depression can be more severe and less responsive to external circumstances, leading to a higher risk of suicidal thoughts and behaviors.

**Why Each Wrong Option is Incorrect**
**Option A:** Reactive depression is a type of depression that is triggered by a specific external event, such as the loss of a loved one or a job. While it can still be severe, it is often more closely tied to the external circumstance and may not carry the same level of suicidal risk as endogenous depression.
**Option C:** Childhood depression is a type of depression that occurs in children and adolescents, and while it can be severe, it is not typically characterized by the same level of suicidal risk as endogenous depression in adults.
**Option D:** Depression in involution refers to a type of depression that occurs during the involutional period of life, typically around menopause or mid-life. While it can be associated with suicidal risk, it is not as strongly linked as endogenous depression.

**Clinical Pearl / High-Yield Fact**
It is essential to recognize that **endogenous depression** carries a higher risk of suicidal ideation and behavior, and patients with this condition should be closely monitored and treated accordingly.

**Correct Answer:** B. Endogenous depression