For MC, (I)For PE, (III)1) I presume you are asking about your choice of courses for undergraduate study.2) I would say that it depends what type of management consultancy you're interested in. I presume that you've already recognised the parallels in skills and knowledge between PE and finance consulting (e.g. MOW or LEK) so when you say "MC" you're interested in the contrast with S&O consulting (e.g. MBBB).3) Pragmatically, your choice between these three degree concentrations will make less difference than how you perform academically in your chosen concentration, the quality of the institution where you study that concentration, and your extracurricular activities. Given that you can get into both MC and PE with a Liberal Arts degree, any of these three concentrations will give you a decent shot at either of the career paths.