C. Median toxicity.
Explanation – The frequency of drugs are given based on its toxicity or the side effects in the body. All drugs have certain half-life in which there action is maximum and after that the drug is removed through the urine primarily.
Different people react differently to a drug and hence the doctors prescribe the anti-tablets for the side effects occurring. The drug for cold is prescribed after four hours because its effect gets reduced and has to be removed from the body.
A major way to prevent running injuries is to stretch and warm up before running, and cool down after.
Treating a city's water supply to remove any bacteria and impurities as clean and hygenic water supplies benefits the public/society.
Bc most men are too embarrassed to let people know they have it or go to the doctors to treat it
Letter C! One hour, children must have one hour of physical excercise each day.
