C-09-Q081mediumsingle_mcqIn right △ABC\triangle ABC△ABC with ∠C=90∘\angle C = 90^\circ∠C=90∘, AB=13AB = 13AB=13, BC=12BC = 12BC=12, ∠ABC=θ\angle ABC = \theta∠ABC=θ. Then AC=?AC = ?AC=?a555b777c111111d1212