Question: Which of these are logically equivalent? I. ( p ? ? q ) r and ( p r ) ? ? ( q r )

Which of these are logically equivalent?
I. (p??q)r and (pr)??(qr)
II. notp(qr) and q(pvvr)
III. not(pharrq) and pharrnotq
II only
I and II
III only
I only
I, II, and III
I and III
II and III
Which of these are logically equivalent? I. ( p ?

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