If diamond is called gold, gold is called silver, silver is called ruby, ruby is called emerald, which is the cheapest jewel ?

D. RUBY

If water is called blue, blue is called red, red is called white, white is called sky, sky is called rain, rain is called green and green is called air, which of the following is the colour of milk ?

E. SKY

The number in each question bleow is to be codified in the following code:
Digit 7 2 1 5 3 9 8 6 4
Letter W L M S I N D J B
->  184632

D. MDBJIL

In a certain code, a number 13479 is written as AQFJL and 5268 is written as DMPN. How is 396824 wriitten in that code ?

B. QLPNMF

In a certain code, 3456 is coded as ROPE, 15526 is coded as APPLE, then how is 54613 coded ?

C. POEAR