Option 1 -> 2019 was too early; the Global Biofuel Alliance initiative had not been conceptualized at this time.
Option 2 -> 2020 was the peak of the COVID-19 pandemic; this alliance was not formed during this period.
Option 3 -> 2022 saw various climate initiatives, but the Global Biofuel Alliance was not yet launched.
Option 4 -> 2023 marks the actual launch year of the Global Biofuel Alliance during India's G20 Presidency.
Hence, Option 4: 2023 -> The Global Biofuel Alliance was officially launched on September 9, 2023, at the G20 Summit in New Delhi during India's G20 Presidency, with founding members including India, USA, Brazil, Argentina, Bangladesh, Italy, Mauritius, Singapore, and UAE, aimed at promoting sustainable biofuels and facilitating technology cooperation among member countries -> correct