Which of the following are the some initial conditions for the emergence of a tropical cyclone:
1. Weak Coriolis force
2. Absence of strong vertical wind wedge
3. Large and continuous supply of warm and moist air
Select the correct answer using the correct codes given below:
1. 1 and 2 only
2. 1 and 3 only
3. 2 and 3 only
4. 1, 2 and 3