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?

1. A

   1 only

   1 only. Jet streams exist in both hemispheres.

2. B

   2 and 3 only

   2 and 3 only. The eye is warmer, not ~10°C colder.

3. C

   2 only

   2 only. Only intense tropical cyclones develop a clear eye. Jets are both hemispheres; the eye is a warm core.

4. D

   1 and 3 only

   1 and 3 only. Both fail.

Summary. Official key is (c) 2 only. An eye forms in organised, intense cyclones, not in every low. Jet streams fly in both hemispheres. Inside the eye the air is warmer than the eyewall, not ten degrees colder.