Choose or find odd word - Island , Coast , Harbour , Oasis , Peninsula

D. OASIS

Choose or find odd word - Lake , Brook , Stream , River

A. LAKE

Choose or find odd word - Thyroxine , Adrenalin , Iodine , Insulin

C. IODINE

Choose or find odd letter group - DFCE , HIGJ , NPMO , ZXWY

B. HIGJ

Choose or find odd pair of words - (Ornithology : Birds) , (Mycology : Fungi) , (Biology : Botany) , (Phycology : Algae) , (Entomology : Insects)

C. BIOLOGY : BOTANY