The correct answer is: a) Bus transport services.
Punjab Roadways is a state-owned corporation providing bus transport services in the Indian state of Punjab. It was founded in 1948 and is headquartered in Chandigarh. The corporation operates a fleet of over 10,000 buses and serves over 1,000 destinations in Punjab and neighboring states.
Punjab Roadways offers a variety of bus services, including inter-city, intra-city, and express services. The corporation also operates a number of special services, such as tourist buses and school buses.
Punjab Roadways is a major employer in Punjab and provides employment to over 30,000 people. The corporation is also a major contributor to the state’s economy.
The other options are incorrect because Punjab Roadways does not provide railway services or air travel.