Choose or find odd letter group - RUX , GJM , YBE , ZCF , NPS

E. NPS

Choose or find odd word - Copper, Tin, Brass, Platinum, Zinc

C. BRASS

Choose or find odd letter group - EFGIK , CDFIM , BCEHL , ABDGK

A. EFGIK

Choose or find odd word - Sleet , Fog , Hailstone , Vapour , Mist

D. VAPOUR

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

C. 81