Choose or find odd letter group - UAZF , SCXH , RDWJ , KBPG

C. RDWJ

Choose or find odd letter group - VTOJE , USNID , UPKEA , OMIDB

B. USNID

Choose or find odd letter group - AOT , CPA , REB , TIW , QUD

B. CPA

Choose or find odd letter group - xXYA , iIMP , hHIK , bBCE

B. IIMP

Choose or find odd letter group - AE , AI , IO , EI , OU

B. AI