Which of the following statements is/are correct in context of tropical cyclones?

1.    Tropical cyclones move with very low velocity over the oceans but become strong while moving over land areas

2.    They are confined to a particular period of the year, mainly late summer and normally move from east to west in both the hemispheres.

3.    The Coriolis force caused by the rotation of the Earth helps the spin of this column of rising air.

4.    In case of tropical cyclones, sea surface temperature is one of the factors impacting the number and severity of cyclones.

Select the correct answer using codes given below