The correct answer is (b) Firozpur.
Firozpur is a district in the Indian state of Punjab. It is located in the northwestern part of the state, bordering the state of Rajasthan to the west and the country of Pakistan to the north. The district has a population of over 2.5 million people and is the second most populous district in Punjab after Ludhiana.
Firozpur is known for its agricultural production, particularly its potato cultivation. The district is home to over 100,000 hectares of potato fields, which produce over 1 million tonnes of potatoes each year. The potatoes grown in Firozpur are known for their high quality and are exported to countries around the world.
The other options are incorrect because they are not districts in Punjab that are known for potato cultivation. Jalandhar is a district in the northwestern part of Punjab, but it is not known for its potato cultivation. Gurdaspur is a district in the northeastern part of Punjab, but it is not known for its potato cultivation. Patiala is a district in the central part of Punjab, but it is not known for its potato cultivation.
In conclusion, the correct answer to the question “Which district in Punjab is known for potato cultivation?” is (b) Firozpur.