The correct answer is: A. Lord Vishnu.
Mandar hill is a mountain in the Indian state of Madhya Pradesh. It is sacred to Hindus and is said to be the place where the gods and demons churned the ocean of milk to obtain the nectar of immortality. The hill is also home to a number of temples, including the famous Narmada Kund temple.
The image of Lord Vishnu in his man-lion incarnation, Narasimha, is one of the most famous and revered images in Hinduism. Narasimha is said to have appeared to kill the demon Hiranyakashipu, who was terrorizing the world. Narasimha is depicted as a man with the head of a lion. He is often shown standing on the body of Hiranyakashipu, with one foot on his chest and the other on his stomach.
The image of Narasimha on Mandar hill is a unique and powerful representation of this important Hindu deity. It is a popular pilgrimage destination for Hindus from all over India.
The other options are incorrect because they do not correspond to the image of Narasimha on Mandar hill. Lord Shiva is not depicted as a man-lion, and Lord Ganesha is not depicted as a man at all.