Hi,
Basically, that question is asking: can a Catholic VALUE a human life as a unique person, created in the image and likeness of God for whom He suffered and died—and at the same time DENY that this same human life is a unique person, created in the image and likeness of God for whom He suffered and died?
So long as one has the use of right reason, there is no way one can hold such opposite positions at the same time. In other words, NO, a Catholic cannot be both Catholic and pro-choice.
Fr. Vincent Serpa, O.P.