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

A. EFGIK

Choose or find odd letter group - BCDEI , PQRSW , LMNOS , TUVWA , HIKLO

E. HIKLO

Choose or find odd pair of words - (Mercury : Sun) , (Moon : Earth) , (Star : Galaxy) , (Wheel : Axle)

C. STAR : GALAXY

Choose or find odd word - Madagascar , Thailand , Cude , Greenland , Tasmania

B. THAILAND

Choose or find odd word - Mahanadi , Cauvery , Narmada , Krishna

C. NARMADA