Consider the following atmospheric conditions with reference to Tropical cyclones. 1. High relative humidity. 2. Warm oceanic temperature. 3. Region King between the tropics of Cancer and Capricorn. Which of the above motivate the development of cyclone?

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