Kwashiorkor:

1. It is a nutritional disorder due to protein deficiency.

2. It occurs in children between 6 months to 3 years.

3. There is odema (swelling of hand and feet).

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Marasmus:

1. It is also a nutritional disorder due to deficiency of proteins and calories.

2. It occurs in infants under 1 year of age.

3. There is no odema.