**Core Concept**
Thrombotic thrombocytopenic purpura (TTP) is a rare blood disorder characterized by the formation of blood clots in small blood vessels throughout the body. This leads to a decrease in platelet count, hemolytic anemia, and various systemic symptoms.

**Why the Correct Answer is Right**
Hypertension is not a typical feature of TTP. In fact, hypertension is not a common symptom in TTP, unlike the other options listed. The correct symptoms of TTP include fever, hemolysis, and low platelet count. The pathophysiology of TTP involves the formation of blood clots, which can lead to a decrease in platelet count, hemolysis, and renal failure, but hypertension is not a primary symptom. The typical presentation of TTP includes pentad of symptoms: fever, hemolytic anemia, thrombocytopenia, renal failure, and neurological symptoms.

**Why Each Wrong Option is Incorrect**
**Option A:** Fever is a common symptom in TTP, often one of the presenting features, and is part of the pentad of symptoms.
**Option B:** Haemolysis is a key feature in TTP, occurring due to the formation of blood clots in small blood vessels, which can lead to hemolytic anemia.
**Option D:** Low platelets count is a hallmark of TTP, resulting from the formation of blood clots in small blood vessels, leading to a decrease in platelet count.

**Clinical Pearl / High-Yield Fact**
One of the key features of TTP is the presence of schistocytes in the peripheral blood smear, which are fragmented red blood cells resulting from the mechanical damage caused by the blood clots in small blood vessels.

**✓ Correct Answer: C. Hypertension**