adjective
what one or ones of a group :what particular one or ones - used to indicate what is being shown, pointed to, or mentioned
every which way
pronoun
what one or ones out of a group - used to indicate or ask what is being shown, pointed to, or mentioned
a - used to introduce an additional statement about something that has already been mentioned
b - used after a preposition to refer again to something that has already been mentioned
c - used to introduce a group of words that limits the meaning of a noun to a specific place or thing
which is which
used to say that you are unsure about the identity of each member of a group