Choose or find odd word - Pupil , Iris , Cornea , Medulla , Retina

D. MEDULLA

Choose or find odd word - Teacher , Principal , Student , Lecturer

C. STUDENT

Choose or find odd word - Circle , Ellipse , Sphere , Cube

D. CUBE

Choose or find odd word - Goblin , Goblet , Imp , Gnome , Djinn

B. GOBLET

Choose or find odd word - Inch , Foot , Yard , Quart , Metre

D. QUART