Which of the following nations won the first T20 World Cup in 2007?

India

The correct answer is Option (3) → India

India won the first ICC T20 World Cup in 2007, which was held in South Africa. The Indian cricket team, led by captain Mahendra Singh Dhoni, defeated Pakistan in the final to clinch the championship. This victory marked India's success in the newly introduced format of Twenty20 cricket at the international level.