The correct option is A (i)-Dependence, (ii)-withdrawal syndrome
Drugs are chemical substances which cause physiological changes when administered into an organism’s body. The different categories of drugs include stimulants, analgesics (pain killers), hallucinogens, sedatives, tranquilisers and performance enhancers.
Different types of drugs may be legally prescribed by doctors in measured doses for the various physical and psychological impacts that they have on our body. But many drugs are illegally misused without a proper prescription for the perceived benefits of euphoria, well-being, escape from reality etc. Prolonged use of drugs may lead to a psychological attachment to these effects and cause addiction.
As time passes, the body develops a dependence on the drugs because of which the body fails to function properly in their absence. The tendency of the body to manifest an unpleasant withdrawal syndrome if a regular dose of drugs is abruptly discontinued is called dependence. Drug dependence can arise from both the intake of drugs in prescribed doses and their abuse in excessive doses.
Abruptly discontinuing regular doses of a drug, for which the body has developed dependence, can result in the manifestation of some unpleasant withdrawal symptoms to combat with the absence of the drug. These symptoms include anxiety, shakiness, nausea, sweating, vomiting, etc. A person is relieved of these symptoms once the drug intake is resumed.
Hence, dependence is the tendency of the body to manifest withdrawal syndrome when the regular dose of drugs is suddenly discontinued.