Consider the following rivers/tributaries 1. Satluj 2. Beas 3. Ravi 4. Indus 5. Ganga 6. Ghaghara Which of the above rivers/tributaries are believed to be older than the Himalayas?

• A.  1, 2, 4 and 5 only         
• B.  1 and 4 only
• C.  2, 3, 5 and 6 only         
• D.  1, 4, 5 only