The correct answer is option 3: 3.28 million square km.
Option 1, 1.28 million square km, is incorrect.
Option 2, 2.28 million square km, is also incorrect.
Option 4, 4.28 million square km, is incorrect as well.
India has a land mass of approximately 3.28 million square km. This makes India the seventh-largest country in the world by land area. Its large size gives India a diverse range of geographical features, including mountains, plains, and rivers. The land area of India is home to a rich and varied ecosystem, with a wide array of plant and animal species.