Does the Quran have the wrong concept of Trinity in 5:116?

Some Christians argue that, "the Quran 5:116 wrongly defines the Trinity. Trinity is not Allah, Jesus and Mary. Further Catholics do not worship Mary but pray via her to God." How do we respond to this? > And behold! Allah will say: "O Jesus the son of Mary! Didst thou say > unto men, worship me and my mother as gods in derogation of Allah'?" > He will say: "Glory to Thee! never could I say what I had no right (to > say). Had I said such a thing, thou wouldst indeed have known it. Thou > knowest what is in my heart, Thou I know not what is in Thine. For > Thou knowest in full all that is hidden. > > -- Quran 5:116