UCSB Majors: Biochemistry vs. Chemistry vs. Biology

I am an incoming freshman to SB and was admitted with chem. My goal is to reach med school with the easiest approach possible. Of course, not every school has the same level of difficulty when it comes to majors in terms of the average GPA they receive. Which major would be recommended to better my chances of getting into med school? In other words, which major is a person more likely to achieve a higher GPA and a higher MCAT score at SB?

Admitted with Biochem***