Emperor Jahangir ordered Zafar Khan to invade Kokra as the area was known to be rich in

The correct answer is: A. Gold

Emperor Jahangir ordered Zafar Khan to invade Kokra as the area was known to be rich in gold. The invasion took place in 1616 and was successful, with Zafar Khan capturing a large amount of gold. The gold was then taken back to Agra, where it was used to finance Jahangir’s lavish lifestyle.

The other options are incorrect because:

• Option B: Diamond. There is no evidence that Kokra was ever known to be rich in diamonds.
• Option C: Silver. There is no evidence that Kokra was ever known to be rich in silver.
• Option D: Copper. There is no evidence that Kokra was ever known to be rich in copper.

In conclusion, the correct answer is: A. Gold