Use of polished rice in human diet causes the following disease

1. A

   Beriberi

   (a) Beriberi. Polishing rice strips the bran that holds thiamine (vitamin B1). Thiamine lack causes dry or wet beriberi. (a) Official key.

2. B

   Goitre

   (b) Goitre. Iodine deficiency enlarges the thyroid. It is not a polished-rice disease.

3. C

   Night blindness

   (c) Night blindness. Vitamin A (retinol) deficiency; rice polish is not the classic cause.

4. D

   Colour blindness

   (d) Colour blindness. Usually an X-linked genetic defect of cone pigments, not a dietary rice effect.

Summary. Official key is (a). A polished-rice diet lacks thiamine and produces beriberi. Goitre is iodine, night blindness is vitamin A, colour blindness is typically genetic.