**Core Concept**
In a cirrhotic patient with severe haematemesis, the primary goal is to restore circulating blood volume and maintain adequate oxygen delivery to vital organs. Cirrhosis leads to portal hypertension, splenomegaly, and ascites, which compromise the patient's ability to effectively compensate for blood loss.

**Why the Correct Answer is Right**
The management of choice in a cirrhotic patient with severe haematemesis is whole blood transfusion. This is because cirrhotic patients often have a complex interplay of coagulopathy, thrombocytopenia, and splenic sequestration, which can lead to difficulty in achieving hemostasis with crystalloid or colloid solutions alone. Whole blood transfusion, which includes red blood cells, platelets, and clotting factors, is better suited to correct the underlying coagulopathy and restore adequate oxygen delivery to the tissues.

**Why Each Wrong Option is Incorrect**

**Option B:** Colloids are preferred over crystalloids in certain situations, but in the context of a cirrhotic patient with severe haematemesis, whole blood is still the most appropriate choice. Colloids may not effectively address the underlying coagulopathy.

**Option C:** Normal saline infusion is not sufficient to manage a cirrhotic patient with severe haematemesis. Normal saline can help expand plasma volume, but it does not address the underlying coagulopathy or replace lost blood components.

**Option D:** IV fluid with diuretics is contraindicated in a cirrhotic patient with severe haematemesis. Diuretics can worsen the patient's volume depletion and exacerbate the underlying coagulopathy.

**Clinical Pearl / High-Yield Fact**
In a cirrhotic patient with severe haematemesis, it is essential to consider the use of fresh frozen plasma (FFP) or platelets to correct coagulopathy and promote hemostasis. This can be achieved by administering FFP or platelets concurrently with whole blood transfusion.

**Correct Answer Line**
✓ Correct Answer: A. Whole blood transfusion is the best.