Choose or find odd word - Piano , Typewriter , Computer , Calculator

A. PIANO

Choose or find odd pair of words - (Ornithology : Birds) , (Mycology : Fungi) , (Biology : Botany) , (Phycology : Algae) , (Entomology : Insects)

C. BIOLOGY : BOTANY

Choose or find odd letter group - WHEAT , TRAIN , PROUD , DRIVER

D. DRIVER

Choose or find odd letter group - MOTXYZ , GKRVWX , PSBEFG , ORNODF , CHJLMN

D. ORNODF

Choose or find odd letter group - CegI , FhjL , PrtV , KnpR , UwyA

D. KNPR