Step 1: Concept Understanding:
The Mughal School of painting originated with Persian masters. The task is to identify these founding Persian artists from the provided list.
Step 3: Detailed Explanation:
(A) Mir Sayyid Ali: A master of the Persian Safavid school, invited by Emperor Humayun to found the Mughal atelier.
(B) Bihzad: A highly influential Persian painter, but he never worked for the Mughal court.
(C) Sahibdin: A prominent Indian artist of the Rajasthani (Mewar) School, not a Persian artist at the Mughal court.
(D) Abd Us Samad: Another key Persian master, brought by Humayun, who significantly contributed to establishing the imperial Mughal workshop.
Step 4: Final Answer:
Mir Sayyid Ali and Abd Us Samad were the Persian artists who founded the Mughal court atelier. Thus, options (A) and (D) are correct.