We were searching for the Golden Quadrilateral for our Geo Quiz today. It's not a region of the Atlantic where ships and planes have mysteriously disappeared.

That's the Bermuda Triangle.

Gloden Quadrilateral map

Nor is it the opium growing region in Southeast Asia. That's the Golden Triangle. Murad Ali Baig has the answer. He's writes about the auto industry for the Times of India newspaper.

Mr. Baig --- where is the Golden Quadrilateral?

“It's the network of highways that interconnects Delhi, Mumbai, Calcutta and Chennai (thus forming a quadrilateral of sorts.”

Listen to the interview