Mohandas gandhi adopted his creed of nonviolence and respect for life from the religious doctrines of
a. islam.
b. sikhism.
c. buddhism.
d. jainism.

The nonviolence movement which Gandi advocated is known under the name "ahimsa" - and Ahimsa is important in three religions: Hinduism, Jainism and Buddhism. Of those, Hinduism was Gandhi's main religion, but Gandhi was known for adopting it from another religion: Jainism.

The correct answer is then D)

81 is a composite number

The answer is false,  hope my answer is : )