Consider the following statements about the megacities of India: 1. Population of each megacity is more than 5 million. 2. All the megacities are important sea ports. 3. Megacities are either national or state capitals. Which of these statements are correct?

• A. 1, 2 and 3
• B. 1 and 2
• C. 2 and 3
• D. 1 and 3