Answer : 2. "Rahul Singh"
Explanation :

Senior bureaucrat Rahul Singh has recently been appointed Chairman of the Central Board of Secondary Education (CBSE) by the Central Government. The Appointments Committee of the Cabinet (ACC) has approved the appointment of Singh, a 1996 batch Indian Administrative Service (IAS) officer of Bihar cadre, as the Chairman of CBSE. He will replace Nidhi Chhibber, who has been named advisor in NITI Aayog.