Arrange the following in decreasing Lewis acid strength -PF3, PCI3, PBr3, Pl3

• A. Pl3 > PBr3 > PCl3 > PF3
• B. PF3 > PCl3 > PBr3 > Pl3
• C. PCl3 > PBr3 > Pl3 > PF3
• D. PBr3 > Pl3 > PF3 > PCl3