Which one of the following is not a narcotics analysis?
Morphine
Codeine
Heroin
Aspirin
Aspirin and paracetamol belong to the class of non-narcotic analgesics. Aspirin is the most familiar example. Aspirin inhibits the synthesis of chemicals known as prostaglandins which stimulate inflammation in the tissue and cause pain.
Morphine, Heroin and Codeine belong to the class of narcotic analgesics. Morphine and many of its homologues, when administered in medicinal doses, relieve pain and produce sleep. In poisonous doses, these produce stupor, coma, convulsions and ultimately death.
So, Option 4 is correct.