Choose or find odd word - Tiger , Cow , Cheetah , Leopard

B. COW

Choose or find odd pair of words - (Pyroheliometer : Radiation) , (Calorimeter : Humidity) , (Planimeter : Area) , (Barometer : Humidity)

D. BAROMETER : HUMIDITY

Choose or find odd letter group - RNJ , XTP , MIE , ZWR

D. ZWR

Choose or find odd pair of words - (Malaria : Protozoa) , (Yeast : Fungi) , (Typhoid : Bacteria) , (Polio : Virus)

B. YEAST : FUNGI

Choose or find odd word - Epicentre , Seismology , Focus , Crater , Richter Scale

D. CRATER