If a person picked up his tefilin before his talis, he puts on his tefilin first (Shulchan Orech OC 25:1). Additionally, if a person picked up his shel Rosh before his shel yad (ibid. :6) he puts down the shel rosh and puts on the shel yad.
What happens if a person picks up his shel rosh before his talis; does he
A) put it down and don his shel yad first since he has engaged with his tefilin he should not switch to his talis?
B) put it down and now that he's holding nothing he's effectively starting from scratch and should put on his talis?