Beri-beri is due to the deficiency of which vitamin?

Which is the best source for vitamin $B_1$?

Protein deficiency results in .......

Which of the following is the matching pair of the deficient nutrient and the resulting disease in which the patient develops swollen lips,thick pigmented skin of hands and legs,and irritability?

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 . . . . . . .

$PEM$ stands for: