X and Y can do the job in $25$ days and $30$ days respectively. They work together for $5$ days and then X leaves. Y will finish the rest of the work in how many days?

Directions: From the options given below, choose the correctly spelt word.

In the following questions, some sentences have errors and some have none. Find out which part of a sentence has an error. The number of that part is the answer. If there is no error, your answer is (D) i.e. No error.

Knowledge of (A)/ at least two languages (B)/ are required to pass the examination. (C)/ No error (D)