Which of the following is a protein-deficiency disease?

If breast feeding is replaced by less nutritive food,low in proteins and calories,then the infants below the age of one year are likely to suffer from . . . . . . .

An average man needs approximately

Obesity can be reduced by reducing the calories intake from

To obtain an adequate supply of carbohydrates,a person should consume ......

Which one of the following is the best source for vitamin $A$ (Antixerophthalmic)?