The mechanics of the actual election seem to be decent enough. But there is rampant vote buying in many areas. I've personally seen liquor handed out for votes. Money, clothing, and alcohol are commonly used to purchase votes in many rural areas. Last I heard, it cost something like like 1000-3000 RS ($15-40) per head in rural Andhra Pradesh.
FT article from 2014: https://www.ft.com/content/a9d35821-f2f1-3479-8082-2ce1e6fa7...