Which is the only country to win world cup in 50 overs, 60 overs and 20 overs formats in the history of Cricket?

India is the only country to win World cup in 50 overs and 60 overs format in One Day International Cricket. In 1983 India won World cup against West Indies in 60 overs category and in 2011 it won against Sri Lanka in 50 overs format. Previously One Day Internationals in Cricket was played for 60 overs later it reduced to 50 overs.

In 2007 Indian won T20 world cup (20 overs format) against Pakistan. It is first World cup in T20 format.