Choose or find odd word - Gorges , Bars , Canyons , Meanders , Rapids

B. BARS

Choose or find odd letter group - WRONG , PRUNE , WHITE , RIGHT

D. RIGHT

Choose or find odd pair of words - (Pistol : Gun) , (Knife : Dagger) , (Engine : Train) , (Car : Bus)

C. ENGINE : TRAIN

Choose or find odd number - 21 , 69 , 81 , 83

C. 81

Choose or find odd letter group - DE , PQ , TU , MO , FG

D. MO