In Mixed number coding type of questions, a few groups of numbers each coding a certain short message, are given. Through a comparison of the given coded message, taking two at a time, the candidate is required to find the number code for each word and then formulate the code for the message given.

In a certain code language, '743' means 'mangoes are good' ; '657' means 'eat good food' and '934' means 'mangoes are ripe'. Which digit means 'ripe' in that language ?

A. 9
B. 4
C. 5
D. 7
Answer: A . 9

Justification: In the first and third statements, the common code digits are '4' and '3' and the common words are 'mangoes' and 'are'.
So, '4' and '3' are the codes for 'mangoes' and 'are'.
Thus, in the third statements, '9' means 'ripe'.