Read the following passage and choose correct options for the answers to the questions that follow. Mr. Verma, our school principal is a grave and solemn man. He cannot put up with the misbehaviour of any student.We have high regards for our principal who leads our school administration perfectly. Which word from the options can replace "grave and solemn' in the given passage?

• A. stern
• B. sensible
• C. sober
• D. sympathetic