Aprotein deficiency resulting in swelling of the body tissue primarily in the feet, legs, and belly is called
a. marasmus
b. kwashiorkor
c. ketosis
d. rickets

The correct answer is B - Kwashiorkor.

Kwashiorkor is condition that usually occurs in infants and young children soon after weaning. It is caused by severe protein deficiency

The symptoms an emaciated appearance in all the body except their ankles, feet and belly, which swell with fluid.

Children or people  who are affected by kwashiorkor recover fully if they are treated early.  Treatment involves introducing extra calories and protein into the diet.

If left untreated, it can cause major organ failure and eventually death.