Choose or find odd pair of words - (Principal : School) , (Soldier : Barrack) , (Artist : Troupe) , (Singer : Chorus)

A. PRINCIPAL : SCHOOL

Choose or find odd word - Pharynx , Bronchiole , Auricle , Alveoli

C. AURICLE

Choose or find odd word - Donkey , Camel , Cow , Mule

C. COW

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

B. USNID

Choose or find odd word - Owl , Eagle , Hawk , Parrot

D. PARROT