With reference to the Himalayan rivers joining the Ganga downstream of Prayagra from West to East, which one of the following sequences is correct?

(a). Ghaghara – Gomati – Gandak – Kosi 

(b). Gomati - Ghaghara – Gandak – Kosi

(c). Ghaghara – Gomati – Kosi – Gandak

(d). Gomati - Ghaghara - Kosi - Gandak 

Explanation: 

The correct sequence of Himalayan rivers joining the Ganga downstream of Prayagraj from west to east is Gomati, Ghaghara, Gandak, and Kosi:

Therefore, the correct answer is (b). Gomati - Ghaghara – Gandak – Kosi

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