Choose or find odd number - 21 , 39 , 51 , 63 , 83

E. 83

Choose or find odd word - Cotton , Jute , Silk , Nylon , Wool

D. NYLON

Choose or find odd pair of words - (Solder : Tin) , (Haematite : Iron) , (Bauxite : Aluminium) , (Malachite : Copper)

A. SOLDER : TIN

Choose or find odd number - 43 , 53 , 63 , 73 , 83

C. 63

Choose or find odd word - Tricycle , Trident , Trifle , Tricolour , Trilogy

C. TRIFLE