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.

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

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