Explanation:

Second option is correct.

In marasmus, the child is malnourished, but with a shrinking belly. This condition occurs due to protein malnutrition.

Protein–energy malnutrition (PEM) is a form of malnutrition that is defined as a range of pathological conditions arising from coincident lack of dietary protein and/or energy (calories) in varying proportions. The condition has mild, moderate, and severe degrees.