Choose or find odd pair of words - (Steel : Utensils) , (Bronze : Statue) , (Duralumin : Aircraft) , (Iron : Rails)

D. IRON : RAILS

Choose or find odd word - Crow , Pigeon , Parrot , Butterfly , Peacock

D. BUTTERFLY

Choose or find odd number - 232 , 431 , 612 , 813

D. 813

Choose or find odd word - Sambhar , Dal , Baikal , Siachen , Chilka

D. SIACHEN

Choose or find odd word - Assassinate , Kill , Kidnap , Stab , Murder

C. KIDNAP