Milk vein in cows contains

A. Water

B. Milk

C. Blood

D. Both B and C

Answer: Option C

Solution(By Examveda Team)

The milk vein in cows contains Blood.
Two milk veins carry blood from the udder to the heart together with two veins in the abdominal cavity. Two arteries carry blood to and from the udder.
When a cow is lying down, 20% more blood flows through the udder; therefore, cows must be able to lie down for sufficient periods.