How would you rank the following investment proposals using profitability index method?

Project Alpha (A): Requires investment of RM80,000, and has present value of future cash inflows of RM96,000;

Project Beta (B): Requires investment of RM75,000 and has present value of future cash inflows of RM120,000;

Project Gamma (G): Requires investment of RM100,000, and has present value of future cash inflows of RM150,000.

a.B, G, A

b.G, A, B

c.A, B, G

d.B, A, G