title: BCNF Decompositions and Lossless joins for Databases
body: <p>Hey all I have an assignment that says:     </p>
  
  <p>Let R(ABCD) be a relation with functional dependencies
  A → B, C → D, AD → C, BC → A
  Which of the following is a lossless-join decomposition of R into Boyce-Codd Normal Form (BCNF)?</p>
  
  <p>I have been researching and watching videos on youtube and I cannot seem to find how to start this. I think I'm supposed to break it down to subschemas and then fill out a table to find which one is lossless, but I'm having trouble getting started with that. Any help would be appreciated!</p>