Correct Answer: (b) Onkareshwar
Note: Mandhata is a holy hill located on the banks of the Narmada river in Khandwa district of Madhya Pradesh. Mandhata, also called Shivapuri or Omkareshwar. The hill lies at a distance of about 12 miles from Mortakka. The hill is of great religious importance, as one of the 12 revered Jyotirlinga shrines of Shiva is located here. There are two temples, namely, Omkareshwar and Amareshwar, which are attractive. Here the Narmada river flows around the hill in the shape of an 'Om'.