The correct answer is option 1, Amarkantak. The river Narmada originates from Amarkantak, which is a pilgrimage town located in the Anuppur district of Madhya Pradesh, India. Amarkantak is a significant location as it is considered the ultimate-source of the Narmada river. It is a unique geological feature as it forms the midpoint of the Vindhya and Satpura mountain ranges. The river starts its journey in Amarkantak and flows through three states - Madhya Pradesh, Maharashtra, and Gujarat - before finally entering the Arabian Sea. Narmada is one of the seven holy rivers of India and has great cultural and religious significance.