For what is VMCL the minimum control speed? I would like to ask which of these options is correct:


  VMCL is the minimum control speed for:
  
  A) approach in go-around configuration
  B) approach in landing configuration
  C) go-around in approach configuration
  D) go-around in landing configuration


I would choose B but my friends disagree due to Certification Standards CS25.19 Minimum Control Speed stating that: 


  VMCL must be established with -
  (6) Go-around power or thrust setting on the operating engine(s).


However that doesn’t mean that my VMCL is the speed that I use for go-around, right? It just says that to establish my VMCL, I need to use go-around power as a reference.

Therefore I think that VMCL is basically just the minimum control speed during an approach in landing configuration.
I would go with B as well.  Minimum Control Speed - Landing is for the critical case where you are in the least favourable possible configuration on approach, gear down, full flap, trimmed at approach speed, C.G. at least favourable location, etc etc, then have one engine fail and the other is put to full power. VMCL is the speed at or above which control can be maintained at that instant maximum asymmetric trust is applied, before the airplane can accelerate or the configuration can be changed.  Go around speed in the approach configuration will be faster than VMCL.  VMCL is the edge of the cliff.