Which of the following is/are used to make soaps? 1. Mustard oil 2. Oil of Eranda 3. Seeds of Mahua plant Choose the correct answer from below given codes:

[A] 1 only

[B] 1 and 2 only

[C] 2 and 3 only

[D] 1, 2 and 3

Answer: D

Notes:

Explanation: Chakrapani discovered mercury sulphide. The credit for inventing soap also goes to him.

He used mustard oil and some alkalies as ingredients for making soap. Indians began making soaps in the 18th century CE.
Oil of Eranda and seeds of Mahua plant and calcium carbonate were used for making soap.

Source: Science NCERT