Which Are Essentially Equivalent Treatments

Multiple Choice

Which are essentially equivalent treatments?

A) dry 200°C heat for 1.5 hours; wet 121°C heat for 15 minutes
B) dry 160°C heat for 1.0 hour; wet 200°C heat for 30 minutes
C) dry 121°C heat for 1.5 hours; wet 200°C heat for 15 minutes
D) dry 100°C heat for 2.0 hours; wet 100°C heat for 30 minutes