Correct option is A
In (S1) "especially" means 'particularly' or 'notably', which is correctly used to emphasize that the noticeable thing about the pair is their impeccable dressing. In (S2) "specially" is used incorrectly; it should be "especially" because it implies 'particularly on days when there is a board meeting'. "Specially" means 'for a specific purpose', which is not the intended meaning here.
· Meanings:
· Especially: particularly; notably.
· Specially: for a specific purpose.