Question

Choose the correct statements from the following
1) Veins are made of three different wall layers and valves.
2) A person with a ‘B’ blood group can donate blood to any blood group of the ABO system.
3) Angina is acute chest pain when blood circulation to the brain is reduced.
4) Vitamin K is necessary for blood clotting.

• A. statements 1 and 2
• B. statements 2 and 3
• C. statements 1 and 4
• D. statements 2 and 4

Answer 1

Answer: (C)

statements 1 and 4

Veins are made of three wall layers namely tunica intima, tunica media, and tunica adventitia. The lumen of the veins is guarded by valves to prevent the backflow of blood.

A person with a B blood group can donate blood to a B group or an AB group but not to O and A group.

Angina is acute chest pain due to impaired circulation to the muscles of the heart.

Vitamin K is necessary for blood clotting.

So, the correct answer is 'statements 1 and 4'.