A primary key in a database MEDIUM 2 Points -0.25 Negative MCQ #2822 Basic IT & MS Office Computer Science Federal NTS Question A primary key in a database Options A Can be duplicated B Must be unique C Can be null D Is optional Reveal Answer Reset 📝 Explanation A primary key uniquely identifies each record in a database table and cannot be duplicated or null. ← Previous MCQ📋 All MCQs📚 LearnNext MCQ → Related MCQs MEDIUM IPv4 addresses have how many bits? MEDIUM IPv6 addresses have how many bits? EASY Which of these is NOT a web browser?