The correct option is B 4
In the second and third statements, the common code digit is '5' and the common word is 'colour'.
So, '5' means 'colour'.
In the first and third statement, '5' means 'colour'. The other common code digit is '2' and the common word is 'chalk'.
So, '2' means 'chalk'.
Thus, in the third statement, '4' means 'white'.