Choose or find odd word - Geometry, Algebra, Trigonometry, Mathematics, Arithmetic

D. MATHEMATICS

Choose or find odd word - Phi , Gamma , Delta , Peso , Beta

D. PESO

Choose or find odd pair of words - (Ammeter : Current) , (Hygrometer : Pressure) , (Odometer : Speed) , (Seismograph : Earthquakes)

B. HYGROMETER : PRESSURE

choose odd numeral pair/group -
( 5:50 ), ( 8:128 ), ( 11:242 ), ( 15:370 )

A. 15:370

Choose or find odd word - Rival , Spouse , Partner , Colleague , Companion

A. RIVAL