Consider the following statements regarding extratropical cyclones: I. They usually develop in the mid and high latitudes. II. They affect a much larger area as compared to tropical cyclone. III. They move from east to west. Which of the statements given above are correct?

Extratropical (temperate) cyclones develop along the polar front in the mid and high latitudes (30°–65°), where cold polar air meets warm tropical air (I correct). They cover a much larger area than tropical cyclones, often extending over thousands of kilometres (II correct). They move from WEST TO EAST under the influence of the westerlies, not east to west (III incorrect). Hence only I and II are correct.