The correct answer is: d) Motorcycle Taxis.
BSRTC offers a variety of bus services, including AC Volvo Buses, Semi-Sleeper Buses, and Electric Buses. Motorcycle taxis are not a type of bus service offered by BSRTC.
AC Volvo Buses are high-end buses that offer a comfortable and luxurious travel experience. They are equipped with air conditioning, reclining seats, and other amenities. Semi-Sleeper Buses are a type of bus that offers a comfortable and affordable travel experience. They are equipped with reclining seats and other amenities. Electric Buses are a type of bus that is powered by electricity. They are environmentally friendly and offer a quiet and comfortable travel experience. Motorcycle taxis are a type of taxi that uses motorcycles instead of cars. They are a popular mode of transportation in some parts of the world, but they are not a type of bus service offered by BSRTC.