a 1-acyl-2-(9Z)-octadecenoyl-sn-glycero-3-phosphocholine + 2 Fe(II)-[cytochrome b5] + O2 + 2 H(+) = a 1-acyl-2-[(R)-12-hydroxyoleoyl]-sn-glycero-3-phosphocholine + 2 Fe(III)-[cytochrome b5] + H2O — reaction