Correct option is D
Let's analyze the given code:
'ish Ito inm' stands for neat and tidy.
'qpr inm sen' stands for small but neat.
'hsm sen rso' stands for good but erratic.
We are asked to find which word represents 'but'.
From the second and third statements, "but" appears in both:
small but neat = 'qpr inm sen'
good but erratic = 'hsm sen rso'
The common code in both statements is 'sen'. Therefore, 'sen' stands for 'but'.
Thus, the correct answer is: (d) sen.