Step 1: Idea:
Use the timeline of Indian rulers and see who stands at the very start.
Step 2: Sort the names by time:
Qutb ud-Din Aibak began ruling in 1206. Iltutmish followed in 1211. Shah Jahan ruled from 1628 and Dara Shikoh was his son in the 1600s, so both belong to the Mughal age, long after the Sultanate began.
Step 3: Pick the earliest:
Among all four, Aibak is the earliest, and he is also known as the founder of the Mamluk dynasty.
Step 4: Conclude:
The first ruler of the Delhi Sultanate is Qutb ud-Din Aibak, which is option 3.
Final Answer:
The answer is Qutub-U-Din-Aibak.
\[ \boxed{\text{Qutub-U-Din-Aibak}} \]