agm battery charging

I guess this question goes in mod tech but I could be wrong. I have a Schumaker battery charger, with one switch that is used to select battery type. The choices are 1. regular lead acid, 2. deep cycle, and 3. AGM.

If you have an agm deep cycle such as an Optima yellow top, would you set it on option 2. or option 3.? I don't see any guidance in the owners manual.

I would use #3.

3 for sure.