What was the theme of G-20 India Summit-2023?

Concept: A G20 summit's theme is the guiding philosophy the host nation chooses to frame the priorities of its presidency. For its 2023 presidency, India anchored this theme in classical Sanskrit thought rather than in any single sectoral slogan.

Application: The G20 New Delhi Leaders' Summit (September 2023), held under India's presidency, adopted the theme "Vasudhaiva Kutumbakam" — a Sanskrit phrase from the Maha Upanishad meaning "the world is one family." Its official English rendering is "One Earth, One Family, One Future." Therefore the correct theme is Vasudhaiva Kutumbakam.

Why the other phrases do not fit:

• "Clean Energy for a Green Future" is a climate and energy tagline; energy transition was a discussion area but never the summit's overarching theme.

• "One World one Future" is a reworded, near-miss slogan that does not match the exact wording India officially adopted.

• "None of these" cannot be right, because one offered phrase — Vasudhaiva Kutumbakam — is the genuine theme.

Cross-check: The phrase is drawn from the Maha Upanishad and appears on the official G20 India theme page and the summit logo, confirming Vasudhaiva Kutumbakam as the 2023 theme.