Which one of the following major sea ports of India does not have a natural harbour?

Match the locations of ports labelled as A, B, C and D in the given map with the names of those ports and select the correct answer using the codes given below the names of the ports: 

Names of Ports:
1. Kakinada 
2. Karwar 
3. Mangalore 
4. Tuticorin 
5. Veraval 

Codes

A B C D

With reference to Indian transport systems, consider the following statements:
1. The Indian railway system is the largest in the world. 
2. Among the states, Kerala has the highest density of surface road. 
3. National Highway number 7 is the longest in the country. 
Which of these statements are correct? 

Consider the following statements:
1. Marmagaon port is situated at the mouth of Zuari river.
2. Kolkata port is connected by NH-$41$.
Which of the statements given above is/are true?