Who is Radha Chauhan? Why the Centre handed this high-octane CBSE evaluation probe to a fearless civil servant

The government has removed the CBSE Chairman and Secretary, appointing retired IAS S. Radha Chauhan to head a 1-month probe into On-Screen Marking flaws.  

Who is Radha Chauhan? Why the Centre handed this high-octane CBSE evaluation probe to a fearless civil servant
The government has removed the CBSE Chairman and Secretary, appointing retired IAS S. Radha Chauhan to head a 1-month probe into On-Screen Marking flaws.