Rio de Janerio is the venue for 2016 Summer Olympics..

whereas your generated question is showing Madrid..plz correct it.by the way good initiative & thanks.keep it up.

here is the copied question with my answer(which you wronged)...

Q.50) 2016 Summer Olympics will be held at:

A. Rio de Janerio (Your Answer)
B. Chicago
C. Sydney
D. Madrid (Correct Answer)