The King who did not allow anybody to laugh in his court was?

Balban

The correct answer is Option (2) - Balban

The king who did not allow anyone to laugh in his court was Balban.

While the other rulers (Iltutmish, Mohammad Bin Tughlaq, and Aurangzeb) were known for their strictness, historical accounts specifically mention Balban's aversion to laughter in his court. He believed it undermined his image of authority and seriousness.