The correct options are
A Bairam Khan was the regent of Akbar.
C Akbar's half-brother, Mirza Hakim, revolted against him.
Akbar was thirteen years old when he became the emperor. His regent was Bairam Khan. His campaigns were marred by the revolt of Mirza Hakim, his half-brother. Akbar defeated the Safavids and captured Qandahar.