On the major airlines operating long-haul services out of Sydney and Melbourne, economy seat width ranges from 43 centimetres to the 48.25 centimetres on Singapore Airlines Boeing 777‑300ER, Airbus A380 and A330-300 flights.
Take context from the input text and decide on the accurate relationship between 'Airbus A380' and 'Singapore Airlines' from the options provided.
Options: original broadcaster, subsidiary, creator, operator