0 votes 0 votes closed with the note: no more inputs needed If a relation R is 3 NF and atmost one compound candidate key [remaining candidate keys are simple ] then R is :- A:-also in BCNF B:-not BCNF C:-may not BCNF D:-none hitendra singh asked Nov 3, 2018 closed Nov 4, 2018 by hitendra singh hitendra singh 223 views comment Share Follow See all 4 Comments See all 4 4 Comments reply Shaik Masthan commented Nov 3, 2018 reply Follow Share check https://gateoverflow.in/17006/which-of-the-following-is-correct-for-3nf-and-bcnf if you got it, then close your question 0 votes 0 votes hitendra singh commented Nov 3, 2018 reply Follow Share what does Y-X mean there ? does it mean set difference of X & Y ? Also can you please tell what is simple candidate key and compound candidate key? 0 votes 0 votes Shaik Masthan commented Nov 3, 2018 reply Follow Share does it mean set difference of X & Y ? yes. what is simple candidate key and compound candidate key simple candidate key means, the key have only one attribute compound candidate key means, the key have more than one attribute if AB combinely forms the key then it is compound candidate key read my answer, it will clear your doubts 0 votes 0 votes hitendra singh commented Nov 4, 2018 reply Follow Share thanks a lot for the explanation.. 0 votes 0 votes Please log in or register to add a comment.