Qantas Airways of _____ country has operated world’s first zero waste commercial flight named ‘QF739’ ?

1. Australia
2. United States
3. Germany
4. Russia

Explanation:
Recently, the Australian flight carrier, Qantas has operated world’s first zero waste commercial flight named QF739 from Sydney to Adelaide which disposed all waste through compost, reuse or recycle.This airline has substituted over 1000 single-use plastic items with more environment friendly items which has helped airline to achieve zero-waste during commercial flight.