Question

Which of the following diseases is not related to circulatory system?

• A. Hypertension
• B. Coronary thrombosis
• C. Stroke
• D. Diphtheria

Answer 1

The correct option is D Diphtheria

Hypertension is high blood pressure.

Coronary thrombosis is the formation of blood clots inside a blood vessel of the heart.

Stroke is caused due to the lack of oxygen to the brain which may lead to paralysis.

So, all these three are related to circulatory system.

However, Diphtheria is an upper respiratory tract illness caused by Corynebacterium diphtheriae.

Thus, the correct answer is option (D), 'Diphtheria'.