Final answer:
The statement that both Harvard and Baylor universities have medical schools is factually correct, hence option A and B are incorrect. Option C is false as there are many universities with medical schools globally. Option D is subjective and cannot be verified without specific criteria.
Step-by-step explanation:
The question at hand involves logical reasoning and understanding of factual information about medical schools at Harvard University and Baylor University. The assumption made in option A is incorrect because both universities do indeed have medical schools. Option B is also incorrect, as it suggests that only one of them has a medical school, which is not true. Option C is factually inaccurate as there are numerous universities around the world with medical schools. Lastly, option D makes a subjective claim about the quality of one medical school compared to the other, without providing any evidence or criteria for comparison.