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The correct answer is option 3. The statement that the Intended Nationally Determined Contribution (INDC) pledged during the 2015 Climate Change Conference has been withdrawn in the Paris Agreement is incorrect.
The Paris Agreement on Climate Change is an international agreement that was signed by more than 190 countries as of March 2017 (option 1). It aims to combat climate change and limit global warming below 2 degrees Celsius. The agreement went into effect on 4 November 2016 (option 2).
Option 3 indicates that the INDC pledged during the 2015 Climate Change Conference has been withdrawn in the Paris Agreement. However, this statement is incorrect. The INDCs (Intended Nationally Determined Contributions) are individualized targets that each country sets in order to reduce greenhouse gas emissions and adapt to the impacts of climate change. These INDCs are a key element of the Paris Agreement and continue to be a part of the agreement.
Option 4 states that both USA and China joined the Paris Agreement, and this statement is true. The United States and China, two of the largest contributors to global greenhouse gas emissions, have both joined the agreement and have been instrumental in its implementation.