Choose the best alternative as the answer. - A book always has

B. PAGES

In a certain code language, '526' means 'sky is blue' ; '24' means 'blue colour' and '436' means 'colour is fun'. Which digit in that language means 'fun' ?

C. 3

Choose or find odd number pair - (6 - 15) , (21 - 43) , (25 - 51) , (29 - 59)

A. 6 - 15

Complete analogous pair - War : Death : : Smoke : ?

B. POLLUTION

Choose analogous pair - Cells : Cytology

B. INSECTS : ENTOMOLOGY