The correct options are
A Kalidasa - Sanskrit writer and poet
B Sanku - Architect
Aryabhatta and Kalidasa adorned the court of Gupta ruler Chandragupta II, who was also known as Chandragupta Vikramaditya. Kalidasa was a classical Sanskrit writer, who was one of the nine gems of Chandragupta’s court but Aryabhatta was not one of the Navratna (nine gems). Aryabhatta was a mathematician and astronomer whose works include the Aryabhatiya and the Arya-siddhanta.