The correct answer is: A. Green Card
The Himachal Pradesh Road Transport Corporation (HRTC) issues a Green Card for journeys under 50 km with a 25% discount. The Green Card is valid for one year and can be purchased at any HRTC bus stand.
The Yellow Card is a monthly pass that allows unlimited travel on HRTC buses within Himachal Pradesh. The Silver Card is a quarterly pass that allows unlimited travel on HRTC buses within Himachal Pradesh. The Gold Card is an annual pass that allows unlimited travel on HRTC buses within Himachal Pradesh.
The Green Card is the most affordable option for passengers who travel frequently on HRTC buses. The Yellow Card and Silver Card are more expensive options that offer unlimited travel on HRTC buses within Himachal Pradesh. The Gold Card is the most expensive option, but it offers the most benefits, including unlimited travel on HRTC buses within Himachal Pradesh and a 25% discount on all other HRTC services.