In the following questions a statement has been given with highlighted text. Select the options that can replace the text with correct idiom or phrase.

His mentor understood the deep anguish the student was going through without him being informed about it.

Read between the lines

The correct idiom to replace the highlighted text is read between the lines.

This idiom means to understand the hidden meaning of something, especially when it is not explicitly stated. The mentor in the sentence was able to understand the student's anguish even though the student did not explicitly tell him about it.