Authentic Classroom Explanation by IAS Monk

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📍 The Question

Consider the following rivers:

1. Brahmani
2. Nagavali
3. Subarnarekha
4. Vamsadhara

Which of the above rise from the Eastern Ghats?

(a) 1 and 2
(b) 2 and 4
(c) 3 and 4
(d) 1 and 3

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✅ Correct Answer: (b) 2 and 4

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🎯 Theme of the Question

Indian Geography | River Origins | Eastern Ghats | Peninsular Drainage

This is a source-based elimination question, testing precise knowledge of physiographic origins rather than river mouths or basins.

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🧠 Classroom Explanation

Let us check each river’s place of origin carefully.

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🔹 1. Brahmani ❌

• Formed by the confluence of Sankh and South Koel
• Both tributaries originate in the Chota Nagpur Plateau
• Not from the Eastern Ghats

✔️ Option 1 is incorrect.

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🔹 2. Nagavali ✅

• Rises on the eastern slopes of the Eastern Ghats
• Origin near Lakhbahal, Kalahandi district, Odisha
• Flows through Odisha and Andhra Pradesh into the Bay of Bengal

✔️ Option 2 is correct.

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🔹 3. Subarnarekha ❌

• Originates near Ranchi in the Chota Nagpur Plateau
• Flows through Jharkhand, West Bengal, and Odisha
• Not an Eastern Ghats river

✔️ Option 3 is incorrect.

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🔹 4. Vamsadhara ✅

• Rises in the Eastern Ghats
• Origin near Kalahandi–Rayagada border, Odisha
• Flows into the Bay of Bengal near Kalingapatnam (Andhra Pradesh)

✔️ Option 4 is correct.

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📊 Final Assessment

River	Origin
Brahmani	Chota Nagpur Plateau ❌
Nagavali	Eastern Ghats ✅
Subarnarekha	Chota Nagpur Plateau ❌
Vamsadhara	Eastern Ghats ✅

👉 Correct combination: 2 and 4

👉 Answer: (b)

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🧩 Memory Hook

“Eastern Ghats send Nagavali and Vamsadhara east.”

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🧠 Prelims Strategy Insight

For river-origin questions:

• Eastern Ghats → short, east-flowing rivers (Odisha–AP belt)
• Chota Nagpur Plateau → Subarnarekha, Brahmani, Damodar family
• Don’t confuse formation by confluence with place of origin

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🧭 IAS Monk Whisper

A river’s truth lies not where it ends,
but where it quietly begins.