Select the most appropriate phrase to fill in the blank.
If you want to do well in life, you _________ believe in yourself.

Correct option is B

The correct phrase is (b) Must.
Must: Indicates necessity, obligation, or certainty. Must (ज़रूरी): जब किसी चीज़ को करना आवश्यक हो। Example: You must complete the project by tomorrow.
Corrected Sentence: If you want to do well in life, you must believe in yourself.
Meanings of other options:
· Can: Indicates ability or permission to do something. Can (सक्षम होना)। Example: You can achieve anything if you work hard.
· Need: Indicates necessity, but weaker than "must." Need (आवश्यकता होना)। Example: You need to practice daily to improve your skills.
· Don't have to: Indicates that something is not necessary. Don't have to (ज़रूरी नहीं है)। Example: You don’t have to attend the meeting if you’re busy.