Question

You ___________ obey the rules and regulations.

• A. may
• B. can
• C. need to
• D. must

Answer 1

Answer:

D. must

Must is used to show obligation / strong necessity / rule.

✔ Sentence meaning:
You are required to obey the rules.

Examples:

• You must wear uniform.

• Students must follow the rules.

• We must obey the law.

❌ may → permission
❌ can → ability / permission
❌ need to → possible, but not as strong as must (exam answer → must)