the least lazy / the laziest

I have to choose the correct words.
Joseph is the least lazy / laziest person.
Of course, the 2nd option is correct but what about the 2nd option? Could it be correct, too?
Thank you for your time and support!

Joseph is the laziest person.
Joseph is the least lazy person.

Joseph is the least laziest person.

‘The laziest person’ and ‘the least lazy person’ not being the same in meaning, I wonder how they were given as choices.

I’m not sure they were. I suspect the question is ambiguous but have attempted to clarify matters with my answer.