Which river is known for the famous "Sangam" at Allahabad, where it meets the Yamuna?

Which river is known for its famous "Hirakud Dam" in Odisha?

Which river is known for the famous "Bhakra Nangal Dam" in Himachal Pradesh?

Which river is also known as the "Dakshin Ganga" or the "River of South"?

Which river is known as the 'Sorrow of Bihar' ?

Which one of the following rivers is not a tributary of Yamuna?