Select the correct statements about elephants from the following:

A. A three-month-old baby elephant generally weighs about 100 kg.

B. An adult elephant can eat more than 200 kg of leaves and twigs in one day.

C. Elephants do not rest very much; they sleep for only two to four hours in a day.

D. Elephants like to play with mud and water.

The correct option is C and D.

Let us analyze each statement about elephants based on standard environmental studies facts:

Statement A: A three-month-old baby elephant generally weighs about 200 kg (not 100 kg). Therefore, Statement A is incorrect.

Statement B: An adult elephant can eat more than 100 kg (or 1 quintal) of leaves and twigs in a single day, whereas 200 kg is an overstatement. Therefore, Statement B is incorrect.

Statement C: Elephants do not rest very much. They sleep for only 2 to 4 hours in a day. Therefore, Statement C is correct.

Statement D: Elephants like to play with mud and water because the mud keeps their skin cool. Therefore, Statement D is correct.

Hence, statements C and D are the correct statements.