Choose or find odd word - Ladder , Staircase , Bridge , Escalator

C. BRIDGE

Choose or find odd pair of words - (Rice : Corn ) , (Tomato : Potato) , (Student : Class) , (Book : Library)

B. TOMATO : POTATO

Choose or find odd word - King , Queen , Bishop , Minister , Knight

D. MINISTER

Choose or find odd word - Volga , nile , Amazon , Congo , Niagara

E. NIAGARA

Choose or find odd word - Buffalo , Llama , Cow , Goat , Camel

B. LLAMA