Which of the following statements is correct regarding the Aravali Range?

a. The Aravalli Range is the oldest range of fold mountains in India.

b. The Aravallis act as a barrier between the fertile plains in the east and the sandy desert in the west.

c. The Aravalli functions as a groundwater recharge zone for the regions around that absorb rainwater and revive the groundwater level.

Select the correct answer using the code given below.