Step 1: Understand the question.
We need the river that starts from the Amarkantak Plateau in Madhya Pradesh.
Step 2: The Amarkantak Plateau.
It lies in eastern Madhya Pradesh where the Vindhya, Satpura and Maikal ranges meet. It is a major source of rivers.
Step 3: Identify the river.
The Narmada River rises from Amarkantak. It is the largest west-flowing river of Peninsular India and flows into the Arabian Sea.
Step 4: Rule out others.
Godavari rises at Trimbakeshwar, Krishna near Mahabaleshwar, and Tapi near Multai. None start at Amarkantak.
Step 5: Conclude.
The correct river is the Narmada.
Answer: Narmada