Q. Which of the following animals are capable of hearing sound frequencies outside the range audible to humans?

1. Bats
2. Dogs
3. Dolphins

Select the correct option from the codes given below:
Answer: 1, 2 & 3
Notes: Humans generally hear between 20 Hz to 20,000 Hz. Dogs hear approximately 40 Hz to 60,000 Hz, bats from 20 Hz to 120,000 Hz, and dolphins from 250 Hz to 150,000 Hz. All three can detect frequencies beyond the human hearing range, enabling unique adaptations for communication and navigation.