The conference was held in Stockholm, the capital of Sweden, in 1972. The conference is widely recognized as the beginning of modern political and public awareness of global environmental problems.

Correct Option: A

The conference was held in Stockholm, the capital of Sweden, in 1972. The conference is widely recognized as the beginning of modern political and public awareness of global environmental problems.

Fine particles known as PM-10 and PM-2.5 can penetrate deep into the lungs, creating health problems. People with heart or lung diseases, older adults, and children are most likely to have problems because of contact with particle pollution. Short-term exposure to PM among pregnant women has been associated with prematurity and growth retardation.

Correct Option: D

Fine particles known as PM-10 and PM-2.5 can penetrate deep into the lungs, creating health problems. People with heart or lung diseases, older adults, and children are most likely to have problems because of contact with particle pollution. Short-term exposure to PM among pregnant women has been associated with prematurity and growth retardation.

Photosynthesis is the process by which light energy is converted into chemical energy by organisms. Carbon dioxide and water are the raw materials of this process. The light energy comes from the sun and its end products are oxygen and glucose.

Correct Option: C

Photosynthesis is the process by which light energy is converted into chemical energy by organisms. Carbon dioxide and water are the raw materials of this process. The light energy comes from the sun and its end products are oxygen and glucose.

The Malabar Grey Hornbill is a hornbill that is endemic to the Western Ghats and associated hills of southern India. They are found mainly in dense forest and around rubber, arecanut or coffee plantations.

Correct Option: A

The Malabar Grey Hornbill is a hornbill that is endemic to the Western Ghats and associated hills of southern India. They are found mainly in dense forest and around rubber, arecanut or coffee plantations.

It was discovered relatively long ago (1930’s) that injections of progesterone were effective as a contraceptive in preventing pregnancies. Progesterone is used as a contraceptive for creating a hostile environment for fertilization and not allowing sperm to enter the egg.

Correct Option: B

It was discovered relatively long ago (1930’s) that injections of progesterone were effective as a contraceptive in preventing pregnancies. Progesterone is used as a contraceptive for creating a hostile environment for fertilization and not allowing sperm to enter the egg.