Option a is the correct answer. The Palitana temple is located near Bhavnagar, in the state of Gujarat, India. It is a complex of more than 900 Jain temples, built on the sacred Shatrunjaya hills. The temples are dedicated to various Tirthankaras (Jain spiritual leaders) and are considered as the holiest pilgrimage site for Jains. The temples were built over a period of 900 years, from the 11th to the 20th centuries CE, by various Jain kings, merchants, and devotees. The temples are known for their exquisite marble carvings, sculptures, and architecture that reflect the Jain values of non-violence, honesty, and simplicity.