Tobacco smoke contains carbon monoxide which is a poisonous gas. It interferes with uptake of oxygen in the lungs and with its release from the blood to the tissues that need it. When carbon monoxide is inhaled it combines with haemoglobin in the blood to form carboxyhaemoglobin, which reduces the amount of oxygen available to the body's vital organs. Oxygen levels may be reduced by as much as 15%.

Correct Option: A

Tobacco smoke contains carbon monoxide which is a poisonous gas. It interferes with uptake of oxygen in the lungs and with its release from the blood to the tissues that need it. When carbon monoxide is inhaled it combines with haemoglobin in the blood to form carboxyhaemoglobin, which reduces the amount of oxygen available to the body's vital organs. Oxygen levels may be reduced by as much as 15%.

An analgesic is any member of the group of drugs used to achieve analgesia, relief from pain. Commonly known as painkillers, analgesic drugs act in various ways on the peripheral and central nervous systems.

Correct Option: B

An analgesic is any member of the group of drugs used to achieve analgesia, relief from pain. Commonly known as painkillers, analgesic drugs act in various ways on the peripheral and central nervous systems.

Rheumatic heart disease is heart valve damage that occurs after an episode of rheumatic fever. To reduce inflammation, aspirin, steroids, or nonsteroidal medications may be given. Aspirin in antiinflammatory doses effectively reduces all manifestations of the disease except chorea, and the response is typically dramatic.

Correct Option: A

Rheumatic heart disease is heart valve damage that occurs after an episode of rheumatic fever. To reduce inflammation, aspirin, steroids, or nonsteroidal medications may be given. Aspirin in antiinflammatory doses effectively reduces all manifestations of the disease except chorea, and the response is typically dramatic.

Aquaculture: farming of aquatic organisms such as fish, crustaceans, molluscs and aquatic plants; Floriculture: cultivation of flowering and ornamental plants for gardens and for floristry; Sericulture: rearing of silkworms for the production of raw silk; and Viticulture: production and study of grapes.

Correct Option: D

Aquaculture: farming of aquatic organisms such as fish, crustaceans, molluscs and aquatic plants; Floriculture: cultivation of flowering and ornamental plants for gardens and for floristry; Sericulture: rearing of silkworms for the production of raw silk; and Viticulture: production and study of grapes.

The parotid gland is a salivary gland in humans. It is one of a pair, and the largest of the salivary glands. Inflammation of one or both parotid glands is known as parotitis. The most common cause of parotitis is mumps.

Correct Option: A

The parotid gland is a salivary gland in humans. It is one of a pair, and the largest of the salivary glands. Inflammation of one or both parotid glands is known as parotitis. The most common cause of parotitis is mumps.