'To read between the lines' means -

A To read quickly to save time

B To read carefully to find out any hidden meaning

C To read carefully

D To read only some lines

Correct Answer: Option B

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