Q. Which one of the following rivers is different from the others ?

Answer: b) Narmada

Explanation:
The Narmada River is different from the others because of its unique geographical and flow characteristics. Here’s why:

1. Narmada River:
– It flows westward into the Arabian Sea, which is uncommon for Indian rivers as most major rivers in India flow eastward into the Bay of Bengal.
– It originates from the Amarkantak Plateau in Madhya Pradesh and flows through a rift valley between the Vindhya and Satpura ranges.

2. Other Rivers:
– Tungabhadra, Penganga, and Mahanadi are all east-flowing rivers that drain into the Bay of Bengal.
– Tungabhadra is a tributary of the Krishna River.
– Penganga is a tributary of the Godavari River.
– Mahanadi is a major river flowing through Odisha and Chhattisgarh, emptying into the Bay of Bengal.

Thus, the Narmada River stands out due to its westward flow and its geological setting, making it different from the others.