context: 
  Himalayan glaciers in the Indian subcontinent are broadly divided into the three
  river basins, namely the Indus, Ganga and Brahmaputra. The Indus basin has the largest number of glaciers (3500), whereas the Ganga and Brahmaputra basins contain about 1000 and 660 glaciers, respectively.
  Ganga is the largest river system in India.However these rivers are just three among many.Some other examples of rivers are narmada, tapi, godwari etc.
oracle_question: Which is the longest river in India?
title: title:List of major rivers of India_parentSection:Introduction_sectionName:Introduction_sectionIndex:3
question: భారతదేశంలో అతి పొడవైన నది ఏది?