You do not need to pretend that no other career exists. The recruiter is usually testing whether your interest in consulting is thoughtful and strong enough to justify the process.

Answer the consulting question directly first. Explain why the work, learning model or client exposure fits what you want, then acknowledge that you are evaluating a small number of relevant alternatives if needed.

Avoid sounding evasive or ranking firms in real time. Saying "Consulting is a leading option because..." is stronger than claiming absolute certainty you do not feel or giving a long list of backup careers.

Prepare two or three specific reasons for consulting that are supported by your experience. The goal is credible motivation, not performing exclusivity before you have even seen the options.

"Leading option" sounds a lot more believable than pretending nothing else is on the table.