Study the following statements with reference to drugs and choose the incorrect ones.
(I) Barbiturates cause sleeplessness.
(II) Opioids are obtained from the leaves of Erythroxylum coca.
(III) Morphine is a very effective sedative and pain killer.
(IV) Cocaine is obtained from hemp plants.

A. (i), (ii) , (iii)
B. (ii), (iii)
C. (i), (iii)
D. (i), (ii), (iv)

Hint: A drug is any substance which, when ingested, causes a change in the physiology or psychology of an organism. Typically, medications are separated from food and substances that offer nutritional help. Inhalation, injection, smoking, ingestion, absorption through a skin patch, suppository or dissolution under the tongue may be the means of drug consumption.

Complete answer:
Barbiturates cause the sleeplessness-
The sedative-hypnotic class, barbiturates are a medicine. They depress and can make you sleepy in your central nervous system. As sedatives or sleeping pills, short- or long-acting barbiturates are administered. These hypnotic medications are most commonly used in the form of anaesthesia.
Opioids are obtained from the leaves of Erythroxylum coca-
In the northern mountains of South America, the coca plant, Erythroxylum coca, and related species have evolved naturally for thousands of years. An ancient tradition of pre-Incan communities is the chewing of coca leaves with alkaline substances such as lime powder. Improving exhaustion, reducing hunger, increasing cognition, and improving mood have been persuasive assets of the plant for indigenous peoples. Opiates are derived from the dried latex opium of the unripen capsular fruit of Papaver somniferum, poppy plant. Opioids are a class of drugs which are either derived from compounds contained in opium poppies, or chemically identical to them.
Morphine is a very effective sedative and pain killer-
Morphine, most widely used in pain control, provides substantial relief for pain-afflicted patients. End-of - life care management, aggressive cancer therapy, and vaso-occlusive suffering during a sickle cell crisis are clinical conditions that profit substantially from morphine medication. For almost any condition that causes discomfort, morphine is generally used off label. Morphine is given in the emergency room for musculoskeletal pain, abdominal pain , chest pain, arthritis, and even heart disease.

Cocaine is obtained from hemp plant.-
Cocaine is a natural stimulant extracted from Erythroxylon coca. Cocaine is a highly addictive and illegal stimulant produced from the leaves of the South American-born coca plant. Cocaine is more than just a stimulant for recreation that gives energy or makes one feel amazing. This is addictive and hazardous. Especially when combined with other harmful substances, it can cause fatal toxicity.
So, the correct answer is “Option D”.

Note:
Pharmaceutical drugs, groups of associated drugs with identical chemical structures and the same mechanism of action, are also categorised into drug classes. The most frequently used drug classification system, the Anatomical Therapeutic Chemical Classification System (ATC), assigns a unique ATC code to drugs, which is an alphanumeric code that assigns them to particular drug groups within the ATC system.