Choose or find odd word - Whale , Dolphin , Shark , Cod , Starfish

A. WHALE

Choose or find odd number - 45 , 99 , 109 , 126 , 207

C. 109

Choose or find odd word - Hydrazine , Warfarin , Malathion , Agrosan , Sulphur

A. HYDRAZINE

Choose or find odd number pair - (13 - 31) , (45 - 54) , (16 - 61) , (71 -88)

A. 71 - 88

Choose or find odd pair of words - (Fish : Pisciculture) , (Birds : Horticulture) , (Bees : Apiculture) , (Silkworm : Sericulture)

B. BIRDS : HORTICULTURE