I am stuck on this homework question. What terms best describe the relationship between (S,R)-2-bromo-3-chlorobutane and (R,R)-2-bromo-3-chlorobutane…

I am stuck on this homework question.

What terms best describe the relationship between (S,R)-2-bromo-3-chlorobutane and (R,R)-2-bromo-3-chlorobutane are:
configurational, enantiomers
conformational, diasteromers
conformational, enantiomers
configurational, diasteromers
conformational, cis/trans

I have narrowed my answer down to b or d but I am unsure if it is conformational or configurational.