The correct answer is Option C: It helps travelers and aviation professionals identify destinations. The code 'DXN' assigned by IATA facilitates accurate communication and identification of destinations at the Jewar International Airport.

The significance of the three-letter code 'DXN' allocated by IATA for the upcoming Jewar International Airport is that it helps travelers and aviation professionals identify destinations.

Why IATA Codes are Important
IATA (International Air Transport Association) codes are three-letter codes assigned to airports worldwide. These codes are used in various aspects of air travel, including ticketing, baggage handling, flight planning, and communication between airlines and airports. They provide a standardized and efficient way to identify airports globally.

Identifying Destinations
The IATA code 'DXN' for the Jewar International Airport will serve as a unique identifier for this specific airport. Travelers and aviation professionals can use this code to easily identify and locate the airport when booking flights, checking flight status, or planning their travel itineraries.

Benefits for Travelers
For travelers, knowing the IATA code of an airport can be helpful in various ways:
1. Flight Bookings: When making flight reservations, travelers can use the IATA code to specify their desired departure and arrival airports accurately.
2. Flight Status: By using the IATA code, travelers can easily track the status of their flights, including departure and arrival times, gate information, and delays or cancellations.
3. Baggage Handling: The IATA code is used on luggage tags to ensure that bags are correctly routed to the intended destination airport.
4. Itinerary Planning: Travelers can use the IATA codes to plan multi-leg trips efficiently, as they can easily identify connecting airports and flights.

Benefits for Aviation Professionals
Aviation professionals, including airlines, travel agents, and airport staff, also benefit from IATA codes:
1. Flight Operations: Airlines and flight crews use IATA codes to communicate with air traffic control, ground operations, and other relevant parties during flight operations.
2. Flight Planning: When planning flight routes, pilots and dispatchers utilize IATA codes to determine the airports involved and calculate distances and fuel requirements.
3. Airport Operations: Airport staff and ground handling agents use IATA codes for organizing and coordinating aircraft movements, gate assignments, and other operational activities.

In conclusion, the IATA code 'DXN' for the Jewar International Airport is significant because it helps travelers and aviation professionals identify destinations easily. It streamlines various aspects of air travel, making it more efficient and convenient for all parties involved.