Which of the following disease is caused by virus?

Rubella

The correct answer is Option (3) - Rubella

• Rubella, also known as German measles, is caused by the rubella virus. It is a contagious viral infection that primarily affects children. The other options mentioned—Tetanus, Leprosy, and Malaria—are caused by different pathogens. Tetanus is caused by the bacterium Clostridium tetani, Leprosy by the bacterium Mycobacterium leprae, and Malaria by the Plasmodium parasites transmitted through the bite of infected mosquitoes.