Vitamin $A$ was discovered by

Which property of water is responsible for maintaining the homogeneity of the cytoplasm?

Statement $X$: Energy transformation always occurs in the metabolism of living organisms.
Reason $Y$: Living organisms continuously obtain energy from food.

Vitamin $B_{12}$ is also known as:

Why does carbon form a wide variety of compounds by combining with itself and other functional groups?

Which of the following is a fat-soluble vitamin and its corresponding deficiency disease?