Choose or find odd word - Calendar , Year , Date , Month , Day

A. CALENDAR

Choose or find odd word - Cockroach , Roundworm , Amoeba , Frog

C. AMOEBA

Choose or find odd word - Epicentre , Seismology , Focus , Crater , Richter Scale

D. CRATER

Choose or find odd word - Reader , Writer , Printer , Publisher , Reporter

A. READER

Choose or find odd word - Tiger , Cow , Cheetah , Leopard

B. COW