Consider the following statements according to Koeppen's classification of climate.
a) The Climatic Regions of Rajasthan by Koeppen are Three.
b) Aw is Semi-Arid region which is found in the southern part of the Rajasthan.
c) Average Rainfall in BShw is 10-20 cm.
d) Steppe and Thorny bushes and grasses are the characteristics of BShw.
Which of the statement/statements given above is/are correct?
1. a only
2. a and b only
3. b and c only
4. d only