Which of the following is/are true about normalisation? Select one or more: Select one or more: Compared to 3NF, BCNF is a less restrictive normal form Denormalisation is a design process that happens before the normalisation process A relation schema R is in BCNF if whenever a non-trivial FD X->A holds in R. then X is a super key. It is always possible to obtain a BCNF decomposition that is both lossless-join and dependency-preserving Compared to 3NF, BCNF eliminates more redundancy