Choose or find odd word - Mercury , Acetone , Petrol , Kerosene

A. MERCURY

Choose or find odd word - Olympus , Apollo , Nataraj , Diana

D. DIANA

Choose or find odd word - Walk , Run , Ride , Crawl

C. RIDE

Choose or find odd letter group - AKEW , PNTO , KCUF , HJMX , IRVD

D. HJMX

Choose or find odd pair of words - (Farmer : Plough) , (Butcher : Chopper) , (Author : Book) , (Jockey : Tack) , (Lumberjack : Axe)

C. AUTHOR : BOOK