To read between the lines----

A to concentrate

B to suspect

C to read carefully

D to grasp the hidden meaning

Correct Answer: Option D

To read between the line (ভালো করে পড়ে অন্তর্নিহিত অর্থ বুঝে নেওয়া) phrase-টির অর্থ To read carefully to find out any hidden meaning.