Given the codes: 'SUN' = 21, 24, 27 and 'MOON' = 19, 22, 25, 28, what is the code for 'STAR'?

Answer: A. 20, 23, 26, 29
The pattern shows an increase of 3 for each letter. Therefore, 'STAR' would be coded as 20, 23, 26, 29.