पुरानी दिल्ली में स्थित तुर्कमान गेट का नाम ऐतिहासिक रूप से किस सूफी संत के नाम पर रखा गया है, और इसकी प्राथमिक स्थापत्य विशेषता क्या है?

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?