<p>Consider relation scheme R = (A, B, C, D) on which the followingfunctional dependencies holds on:</p><p>F = {AC ---> D,</p><p>DB---> A,</p><p>CB---> A,</p><p>DC---->B</p><p>CA---->D}.</p><p>What are the candidate keys of R?</p><p style="margin-left:40.5pt;"/>