**Core Concept**
Variceal bleeding is a life-threatening complication of liver cirrhosis, often caused by portal hypertension. The medical treatment of variceal bleeding aims to control the bleeding, prevent rebleeding, and manage the underlying liver disease.

**Why the Correct Answer is Right**
The recommended agent for medical treatment of variceal bleeding is terlipressin. Terlipressin is a synthetic analogue of vasopressin, which acts by causing vasoconstriction of the splanchnic vessels, thereby reducing portal pressure and controlling bleeding. It also has a longer duration of action compared to vasopressin, allowing for easier administration. Terlipressin is administered intravenously in a hospital setting and is usually given in conjunction with other treatments such as octreotide and endoscopic variceal ligation.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify a recommended agent for medical treatment of variceal bleeding. There are other treatments available, such as octreotide, but it is not the primary recommended agent.
* **Option B:** This option is incorrect because it is not a commonly used medication for the treatment of variceal bleeding. While there are other vasopressin analogues available, terlipressin is the most widely recommended agent for this specific indication.
* **Option C:** This option is incorrect because it is not a medication used to treat variceal bleeding. It may be used for other indications, such as hypertension or certain types of headaches, but it is not the recommended agent for variceal bleeding.

**Clinical Pearl / High-Yield Fact**
Terlipressin is often used in conjunction with octreotide, a synthetic analogue of somatostatin, to control variceal bleeding. The combination of these two agents has been shown to be more effective than either agent alone in reducing portal pressure and controlling bleeding.

**Correct Answer: C. Terlipressin**