The correct answer is: C. Terminal mandi with electronic auction.
Narwal is a town in the Indian state of Jammu and Kashmir. It is located in the Jammu district, about 15 kilometers from the city of Jammu. Narwal is a major agricultural market and is known for its terminal mandi with electronic auction. The mandi is a large market where farmers sell their produce to buyers. The electronic auction system ensures that farmers get a fair price for their produce.
The other options are incorrect.
Option A is incorrect because Narwal is not the largest saffron producing area in Jammu and Kashmir. The largest saffron producing area in Jammu and Kashmir is Pampore.
Option B is incorrect because Narwal is not an agri-export zone for apples. The agri-export zone for apples in Jammu and Kashmir is Sopore.
Option D is incorrect because Narwal is not a potato development farm. The potato development farm in Jammu and Kashmir is located in Kathua.