In a certain code language, ‘phone error rate’ is coded as ‘ku ni pt’ and ‘pronunciationerror rate’ is coded as ‘pt jk ni’. How is ‘pronunciation’ coded in the given language?

Given: 

In a certain code language, ‘phone error rate’ is coded as ‘ku ni pt’ and ‘pronunciationerror rate’ is coded as ‘pt jk ni’.

error, rate and ni, pt are common in both.

So, the code of pronunciation is jk.

Thus, correct option is (d).