Sawai Jai Singh, the ruler of Amber, is known to have constructed five astronomical observatories called 'Jantar Mantar'. Which of the following cities does NOT have any of these observatories?

Who built the Shahi (Royal) road during his rule, which was later renovated and renamed the Grand Trunk Road by the British?

In which year was the Bahmani Sultanate established?

The 'Alai Darwaza', the entrance gate of Qutub Minar, was constructed during whose reign?