If you wish to stay in Tamil Nadu, then you can consider going for either B.pharm or B.Sc nursing, the later being more appropriate, especially if you do not desire to step out of Tami Nadu. But in case you are looking at these courses from a career perspective, the you should consider going for either of the other two, the priority being B.Sc Cardiac Perfusion considering the rate at which heart and lung issues being increasing in the country, it has a great scope for an individual to make a career. otherwise, if you go for B.pharm then there might a little competition, considering that the course is quite famous and people end up pursuing a masters degree as well to have an edge over others. As far as B.Sc cardiac perfusion is concerned not many colleges in India offer this course, so we the requirement in this domain is high, hence if you can consider not having geographic constraints, then you might consider going for this.