In a certain code language, ‘HAZE’ is coded as ‘8574’ and ‘HEAL’ is coded as ‘1745’. What is the code for ‘L’ in that language?

HAZE → 8574, HEAL → 1745

There are three letters and digits are common in both pairs: 

Common letters: H, E, A

Common digits: 7, 4, 5

Code will be 1 for the L.

Thus, the correct option is (b) 1.