Which one of the following foreign travellers elaborately discussed about diamonds and diamond mines of India?

1. The question asks which foreign traveller provided an elaborate discussion on diamonds and diamond mines of India. 2. Francois Bernier (A) was a French physician and traveller who wrote extensively about the Mughal Empire, but his primary focus wasn't specifically on diamonds. 3. Jean-Baptiste Tavernier (B) was a renowned 17th-century French gem merchant and traveller who made multiple voyages to India. His accounts, particularly in 'Six Voyages', contain detailed descriptions of the gem trade, including specific information about diamond mines (like Golconda), types of diamonds, and famous stones (like the Hope Diamond, which he is credited with bringing to Europe). He is considered a key source for the history of diamonds in India. 4. Jean de Thevenot (C) was another French traveller who visited India in the 17th century, but his discussions on diamonds were not as extensive or specialized as Tavernier's. 5. Abbe Barthelemy Carre (D) was a French traveller in the late 17th century whose accounts focused more on political and military events.