Vitamin A is essential to us because their deficiency in the diet causes hardening of cornea, i.e. xerophthalmia and night blindness. Their important sources are carrots, milk, fish, liver and butter.
Vitamin C is essential to us because their deficiency in the diet causes bleeding of gums, i.e. scurvy and pyorrhoea (loosening of teeth).
Their important sources are amla, citrus fruits and green leafy vegetables.