Who, amongst the following, was not a part of the Indian Squash team that won the first ever World Cup title at the SDAT Squash World Cup 2025?

Arjun Erigaisi is an Indian chess Grandmaster, not a squash player, so he was not part of the Indian squash team. India won its first ever SDAT Squash World Cup 2025 title held in Chennai, with team members including Joshna Chinnappa, Anahat Singh, Abhay Singh and Velavan Senthilkumar. Hence Arjun Erigaisi is the correct answer.