They all sound fine, though I do prefer 1b to 1a. With 3, you can emphasize either the person (a) or the disease (b). A: There's measles going around.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
CliveHi guys,
1) a. Who in your family is the tallest? b. Who is the tallest in your family?
I'd say b is preferable because it more clearly and quickly tells the listener that this is a question about height. As soon as I hear 'Who is the tallest . . . ', I pretty well know the kind of thing I am being asked.