## **Core Concept**
The Medical Termination of Pregnancy (MTP) Act allows for the termination of pregnancy under certain conditions. Suction evacuation is a common method used for termination of pregnancy, especially in the first trimester. The procedure involves the use of suction to evacuate the contents of the uterus.

## **Why the Correct Answer is Right**
The correct answer, **- 200 mmHg**, is the pressure commonly employed during suction evacuation in MTP procedures. This pressure range is sufficient to evacuate the uterine contents effectively while minimizing the risk of complications such as uterine perforation or excessive bleeding. The use of **negative pressure** in suction evacuation helps in gently removing the products of conception from the uterus.

## **Why Each Wrong Option is Incorrect**
- **Option A: - 400 mmHg**: This pressure is higher than typically required and could increase the risk of uterine damage or excessive bleeding.
- **Option B: - 100 mmHg**: This pressure might be too low to effectively evacuate the uterine contents, potentially leading to incomplete evacuation.
- **Option D: - 760 mmHg**: This pressure is equivalent to atmospheric pressure at sea level and is not applicable for suction evacuation.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the **suction pressure used in MTP procedures** should be gentle enough to prevent complications but effective enough to ensure complete evacuation. Typically, a pressure of **-200 mmHg** is considered standard for this procedure.

## **Correct Answer:** . **-200 mmHg**