Can I say,<br/><br/>(a) She wears <u>two ribbon on her pigtails.</u><br/><br/>(b) She <u>wears (two) pigtails</u>.<br/><br/>(c) She <u>wears hair in two pigtails.</u><br/><br/>(d) She wears <u>a pair of pigtails. </u>