Option 1 states that the duties and functions of the Indian Coast Guard include preservation and protection of marine environment. This is correct as one of the primary roles of the Indian Coast Guard is to ensure the protection and conservation of the marine environment in Indian waters.

Option 2 states that the duties and functions of the Indian Coast Guard include safety and protection of artificial islands. This is also correct as the Indian Coast Guard is responsible for ensuring the safety and security of artificial islands, especially those in coastal areas, to prevent any unauthorized access or potential threats.

Option 3 states that the duties and functions of the Indian Coast Guard include assistance in anti-smuggling operations. This is correct as the Indian Coast Guard plays a crucial role in preventing and intercepting smuggling activities in Indian waters, thereby maintaining the security and integrity of the country`s coastline.

Therefore, the correct answer is option 4 - 1, 2, and 3.