Verse 4

لَّوْ أَرَادَ ٱللَّهُ أَن يَتَّخِذَ وَلَدًا لَّٱصْطَفَىٰ مِمَّا يَخْلُقُ مَا يَشَآءُ سُبْحَـٰنَهُۥ هُوَ ٱللَّهُ ٱلْوَٰحِدُ ٱلْقَهَّارُ

If God willed, He could have chosen a son from amongst His creation. Be He glorified, He is God, The One, The Supreme.