Option c is the correct answer. The Kanheri caves are a group of rock-cut Buddhist monuments located in the Sanjay Gandhi National Park, near Mumbai, Maharashtra. They are one of the largest and oldest cave complexes in India, dating from the 1st century BCE to the 10th century CE. The caves contain more than 100 Buddhist shrines, monasteries, halls, and stupas, carved out of basalt rock. The caves also have sculptures, paintings, and inscriptions that reflect the history and culture of Buddhism in India.