Detailed Explanation:

Correct Answer: ✅ Only Two (Option B)

Radar works by transmitting radio waves and detecting their reflected signals from objects. It is widely used in weather monitoring and wildlife tracking, but not for identifying narcotics on passengers.

❌ Statement I is Incorrect: Narcotics detection at airports is generally done using X-ray scanners, trace detectors, sniffer dogs, and chemical analysis, not radar.

✅ Statement II is Correct: Weather radars are extensively used to monitor precipitation such as rain, snow, and storms.

✅ Statement III is Correct: Radar technology is used to track the migration of birds, bats, and other animals for ecological studies.

Short Notes: Radar Applications

• RADAR stands for Radio Detection And Ranging.

• It uses radio waves to detect the location, speed, and direction of objects.

• Weather radars monitor rainfall, thunderstorms, and cyclones.

• Doppler Radar can measure the velocity of moving objects.

• Radar is widely used in aviation, defense, navigation, and meteorology.

• It helps track bird and animal migration over long distances.

• Radar works effectively in darkness, fog, and cloudy conditions.