What lens index should I get for my low(ish) prescription?

|n/a|Sphere|Cylinder|Axis| |:-|:-|:-|:-| |OD|\-2.75|\-2.00|175| |OS|\-2.00|\-1.75|10|

Hey everyone, I'm getting my prescription online for the first time and I'm having trouble figuring out what index would be the best for me. They offer; 1.56, 1.61, 1.67, and 1.74. I would be getting them on rectangular metal frames.

Any help would be appreciated, thanks! :-))

EDIT: My PD is 65