Identifying Incorrect River Tributary Pairs in India

The question asks us to identify the pair where the river and its listed tributary are not correctly matched. Understanding the major river systems and their tributaries in India is crucial for answering this type of question.

Let's examine each pair provided:

• Godavari : Indravati
• Ganga : Penganga
• Krishna : Bhima
• Luni : Sukri

Analysis of Each River and Tributary Pair

We will analyze each pair to determine if the stated river is a tributary of the main river.

1. Godavari : Indravati: The Indravati River is a major tributary of the Godavari River. It flows through the states of Odisha, Chhattisgarh, and Maharashtra before joining the Godavari. This pair is correctly matched.
2. Ganga : Penganga: The Penganga River is a major river in Maharashtra, India. It is a tributary of the Wardha River, which in turn flows into the Wainganga River, forming the Pranahita River. The Pranahita River is a significant tributary of the Godavari River. The Penganga River is not a tributary of the Ganga River. This pair is incorrectly matched.
3. Krishna : Bhima: The Bhima River is a major river in southwestern India and is a significant tributary of the Krishna River. It flows through Maharashtra, Karnataka, and Telangana before meeting the Krishna River. This pair is correctly matched.
4. Luni : Sukri: The Sukri River is a tributary of the Luni River. The Luni is a river of the Thar Desert in Rajasthan. Sukri joins the Luni in the plains near Balotra. This pair is correctly matched.

Based on the analysis, the pair that is not correctly matched is Ganga : Penganga.

Therefore, the pair that is not correctly matched is Ganga : Penganga.

Revision Table: Key Indian Rivers and Tributaries

Additional Information on Indian River Systems

India is known as the 'Land of Rivers'. Its river systems can be broadly classified into:

• Himalayan Rivers: These rivers originate from the Himalayas and are perennial (flow throughout the year). Examples include Ganga, Indus, and Brahmaputra.
• Peninsular Rivers: These rivers originate from the Peninsular plateau and are largely seasonal (flow mainly during the monsoon). Examples include Godavari, Krishna, Cauvery, Narmada, and Tapi.

Understanding the tributary network helps in comprehending the drainage pattern and hydrological cycle of a region. Tributaries are smaller streams or rivers that flow into a larger river or lake. Distributaries, on the other hand, are streams that branch off from a larger river, often in deltaic regions.

The Ganga River system is the largest in India. The Godavari River system is the second largest, often called the 'Dakshin Ganga' or 'South Ganga'. The Krishna River system is another major east-flowing peninsular river.