Final answer:
China has the largest population but not the largest land mass.
Step-by-step explanation:
The country in the world with the largest population but not the largest land mass is China. China has the highest population in the world, with over 1.4 billion people. However, in terms of land area, Russia is the largest country. It spans across Eurasia and covers about 17.1 million square kilometers.
Learn more about Population and land mass