Hello
In present scenario all the three that is artificial intelligence data science and machine learning all has there specific requirements. All three have their own demand and in future there will be a use demand for data scientists. AI and machine learning are specialised courses even they have very good future. You can choose either of the three options but Data Science will have more demand. But you should also so try to do AI and machine learning courses together. Because I will be playing a major role once market takes it with a pace.