Explanation:

Article 28 of the Paris agreement enables parties to withdraw from the agreement after sending a withdrawal notification to the depositary, but notice can be given no earlier than three years after the agreement goes into force for the country. Withdrawal is effective one year after the depositary is notified.

• After a three-year delay, the US has become the first nation in the world to formally withdraw from the Paris climate agreement.

India has pledged three quantitative climate change goals:

• reduction in the emissions intensity of Gross Domestic Product (GDP) by 33 to 35 percent by 2030 from 2005 level
• achieving about 40 percent cumulative electric power installed capacity from non-fossil fuel-based energy resources by 2030.
• creating an additional carbon sink of 2.5 to 3 billion tonnes of carbon dioxide equivalent through additional forest and tree cover by 2030.

With contributing 14% of total carbon emission, the US is currently the second biggest emitter after China (26%). The EU nations collectively contribute to 9% of total emission followed by India at 7%.

• Recently, countries such as China, Japan and South Korea had announced their intentions to raise climate action ambition to reach respective ‘net zero targets’, aligning themselves with the EU's similar plan.

Hence only statements 1&3 are correct.