Correct option is D
The correct answer is (d) Hypertension is caused by constriction of veins
Lymph is also called tissue fluid:
Lymph is a clear fluid that drains from tissues and is part of the lymphatic system, also known as tissue fluid. this is correct
Platelets help in clotting of blood:
Platelets play a crucial role in blood clotting by forming a plug at the site of an injury. this is correct
Capillaries join to form veins:
Capillaries converge to form venules, which in turn combine to form veins. this is correct
Hypertension is caused by constriction of veins:
Hypertension (high blood pressure) is typically caused by the constriction of arteries, not veins. Arteries carry blood under high pressure, and their constriction increases blood pressure. this is incorrect