Yes, you can. However, you will need to seek admission in B.Sc. Pathology course and not the diploma in clinical pathology.which is a postgraduate course meant for science graduates. Please note that you will be required to have studied in the science stream in class 12th having studied biology, chemistry and physics to seek admission in B.Sc. Pathology. You must have a science background in school to be eligible to study clinical pathology at the graduation and post-graduation levels.