The correct answer is: C. Both (A) and (B)
Shaka Samvat and Vikram Samvat are two calendars that are used in India. Shaka Samvat is the older of the two, and it is used by Hindus and Jains. Vikram Samvat is the newer of the two, and it is used by Hindus, Sikhs, and Buddhists.
Festivals in Haryana are celebrated on the basis of both Shaka Samvat and Vikram Samvat. For example, the festival of Holi is celebrated on the 15th day of the month of Phalgun, which is according to both Shaka Samvat and Vikram Samvat.
Shaka Samvat is a lunisolar calendar, which means that it is based on the cycles of the moon and the sun. It is believed to have been started by King Shaka in 78 CE. Vikram Samvat is a solar calendar, which means that it is based on the cycles of the sun. It is believed to have been started by King Vikramaditya in 57 BCE.
Both Shaka Samvat and Vikram Samvat are used in India for religious and secular purposes. They are also used to calculate the dates of festivals and other important events.