Choose or find odd letter group - BDI , HKA , LMO , XYU , PQS

A. PQS

Choose or find odd word - Thermosphere , Stratosphere , Exosphere , Ionospher , Troposphere

A. THERMOSPHERE

Choose or find odd letter group - KP , MN , HR , GT , EV

C. HR

Choose or find odd word - Mosses , Lichens , Ferns , Cacti

D. CACTI

Choose or find odd word - Swimming , Diving , Driving , Sailing , Fishing

C. DRIVING