Consider the following statements relating zones of atmosphere to altitude:1. Temperature decreases with altitude in troposphere.2. Speed of sound decreases with altitude in troposphere.3. Temperature increases with altitude in stratosphere.4. Ozone is present in stratosphere which protects people from harmful effects of solar radiation.Which of the above statements are correct?

• A. 1, 2 and 3 only
• B. 1, 2 and 4 only
• C. 3 and 4 only
• D. 1, 2, 3 and 4