Measles is a contagious disease prevalent among school children.

• A. Measles
• B. Mumps
• C. Chickenpox
• D. Influenza

Answer: (A)

Identifying a disease from a description that states the disease by name. The sentence itself names measles and notes it as contagious and common among schoolchildren, so the description points to measles directly. That makes it the best fit because you’re matching the descriptor to the disease that the descriptor actually names. Measles is a highly contagious viral illness spread by respiratory droplets, and it’s well known as a childhood disease before widespread vaccination. The other options describe different illnesses with their own typical features—mumps affects the salivary glands, chickenpox presents as itchy vesicular rash, and influenza usually comes on with sudden fever and body aches. So the description aligns with measles, making it the correct pick.