At which of the following places was diamond mining carried out during

At which of the following places was diamond mining carried out during the Delhi Sultanate period?

Awadh
Khambhat
Panna
Lakhnauti
This question was previously asked in
UPSC CDS-1 – 2024
Diamond mining was carried out at Panna during the Delhi Sultanate period.
Panna, located in present-day Madhya Pradesh, has been historically famous for its diamond mines. Diamond mining in this region dates back centuries and was certainly active during the period of the Delhi Sultanate and later the Mughal Empire.
Awadh (modern Ayodhya/Uttar Pradesh region) and Lakhnauti (in Bengal) were significant administrative and cultural centres but not known for diamond mining. Khambhat (Cambay) was a major port city in Gujarat, crucial for trade, but also not known for diamond mining.