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

D. BAROMETER : HUMIDITY

Choose or find odd number pair - (16 - 64) , (9 - 36) , (36 - 216) , (49 - 343)

B. 9 - 36

Choose or find odd number pair - (1 - 0) , (3 - 8) , (6 - 35) , (7 - 50)

D. 7 - 50

Choose or find odd word - Reader , Writer , Printer , Publisher , Reporter

A. READER

Choose or find odd pair of words - (Cow : Fodder) , (Crow : Carrion) , (Poultry : Farm) , (Vulture : Prey)

C. POULTRY : FARM