10th wiki-link game

I choose the seventh link...

1).  Gropalganj, Bihar  http://en.wikipedia.org/wiki/Gopalganj,_Bihar
2).  Kolkata  http://en.wikipedia.org/wiki/Kolkata
3).  Third Most Populous Metropolitan Area  http://en.wikipedia.org/wiki/List_of_most_populous_metropolitan_areas_in_India
4).  Hyderabad  http://en.wikipedia.org/wiki/Hyderabad,_India
5).  Sixth Most Populous Urban Agglormeration  http://en.wikipedia.org/wiki/List_of_most_populous_metropolitan_areas_in_India
6).  Hyderabad  http://en.wikipedia.org/wiki/Hyderabad,_India

That was a short one!
Points 4 and 6 are the same.  GAME OVER.