The aorta is the largest artery of the human body. It is an artery that directly arises from the heart itself and descends through the thorax and into the abdomen. All the arteries of the body, save the pulmonary arteries, stem from the aorta or one of its main branches.

Correct Option: A

The aorta is the largest artery of the human body. It is an artery that directly arises from the heart itself and descends through the thorax and into the abdomen. All the arteries of the body, save the pulmonary arteries, stem from the aorta or one of its main branches.

An organism having more than two sets of homologous chromosomes is known as polyploid and the phenomenon polyploidy.Polyploidy refers to a numerical change in a whole set of chromosomes. Polyploidy may occur due to abnormal cell division, either during mitosis, or commonly during metaphase I in meiosis.

Correct Option: C

An organism having more than two sets of homologous chromosomes is known as polyploid and the phenomenon polyploidy.Polyploidy refers to a numerical change in a whole set of chromosomes. Polyploidy may occur due to abnormal cell division, either during mitosis, or commonly during metaphase I in meiosis.

The United Nations Conference on Environment and Development (UNCED), otherwise known as the Earth Summit or Rio Summit, was held in Rio de Janeiro, Brazil, in June 1992. An important achievement of the summit was an agreement on the Climate Change Convention. Besides, the Convention on Biological Diversity was opened for signature at the Rio Summiton 5 June 1992 and entered into force on 29 December 1993.

Correct Option: A

The United Nations Conference on Environment and Development (UNCED), otherwise known as the Earth Summit or Rio Summit, was held in Rio de Janeiro, Brazil, in June 1992. An important achievement of the summit was an agreement on the Climate Change Convention. Besides, the Convention on Biological Diversity was opened for signature at the Rio Summiton 5 June 1992 and entered into force on 29 December 1993.

Bleaching powder (CaOC_l2) in manufactured by passing chlorine gas over dry slaked lime. Bleaching powder is also called calcium chlorohypochlorite because it is considered as a mixed salt of hydrochloric acid and hypochlorous acid.

Correct Option: D

Bleaching powder (CaOC_l2) in manufactured by passing chlorine gas over dry slaked lime. Bleaching powder is also called calcium chlorohypochlorite because it is considered as a mixed salt of hydrochloric acid and hypochlorous acid.

DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy.

Correct Option: D

DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy.