Which of the following is an antipyretic medicine?

Paracetamol

The correct answer is option 2. Paracetamol.

The antipyretic medicine among the options provided is Paracetamol.

Paracetamol (also known as acetaminophen): Paracetamol is a commonly used antipyretic and analgesic medication. It is widely used to reduce fever (antipyretic) and relieve mild to moderate pain. Paracetamol is available over-the-counter and is often used to manage fever in conditions such as colds, flu, and other viral or bacterial infections.

Quinine: Quinine is primarily used to treat malaria, a parasitic infection transmitted by mosquitoes. While it may have some antipyretic properties, its primary use is not for reducing fever in the same way as paracetamol.

Luminal: Luminal, also known as phenobarbital, is a barbiturate medication primarily used as an anticonvulsant (to prevent seizures) and as a sedative. It is not commonly used as an antipyretic.

Morphine: Morphine is a potent opioid analgesic primarily used for pain relief, particularly in cases of moderate to severe pain. While opioids may have some effects on body temperature regulation, they are not typically used as antipyretic medications.

Paracetamol is the correct choice among the options provided as it is widely used as an antipyretic medicine to reduce fever.