Which of the following countries has a population of over 1 billion?

Which country is the most populous in the Baltic states? What is the most populous country in the Pacific Islands? Which country is home to over 210 million people and is the 5th most populous country? Which country has a population of over 270 million people and is the 4th most populous country? Which of the following countries has a population density of over 1,000 people per square kilometer? What is the name of the largest ice shelf in Antarctica? What is the name of the Arctic city in Norway known for its Northern Lights displays? Which strait connects the Arctic Ocean to the Pacific Ocean?