Consider the following statements : 1. Jet streams occur in the Northern Hemisphere only. 2. Only some cyclones develop an eye. 3. The temperature inside the eye of a cyclone is nearly 10°C lesser than that of the surroundings. Which of the statements given above is/are correct?

Statement 2 is correct because a well-defined "eye" is a unique feature of mature tropical cyclones, whereas temperate (extra-tropical) cyclones do not possess one. Statement 3 is incorrect because the eye is a region of subsiding air that undergoes adiabatic warming, making it significantly warmer—not cooler—than the surrounding environment. This question tests the core concepts of planetary wind systems (Jet Streams) and the structural dynamics of atmospheric disturbances.