Choose or find odd letter group - PXZD , QSBR , RAEG , SUVW , XYZA

E. XYZA

Choose or find odd pair of words - (Proteins : Marasmus) , (Sodium : Rickets) , (Iodine : Goitre) , (Iron : Anaemia)

B. SODIUM : RICKETS

Choose or find odd word - Titan , Mercury , Earth , Jupiter

A. TITAN

Choose or find odd letter group - BD, IK, PN, SU, WY

C. PN

Choose or find odd pair of words - (Army : General) , (Team : Captain) , (Crache : Infant) , (Meeting : Chairman)

C. CRACHE : INFANT