Explanation: Sustainable Development Goal 9 (SDG 9) is one of the 17 goals set by the United Nations to promote sustainable development worldwide. The goal aims to build resilient infrastructure, promote inclusive and sustainable industrialization, and foster innovation. This goal is crucial for economic growth, job creation, and poverty reduction.
The construction of nuclear power plants (Option A) is an example of an advancement in SDG 9. Nuclear power plants provide a significant source of low-carbon energy, which is essential for sustainable industrialization. By reducing reliance on fossil fuels, nuclear power helps to mitigate climate change and supports the transition to a more sustainable energy mix.
The construction of a metro line in Mumbai (Option B) is another example of an advancement in SDG 9. Urban transportation systems, such as metro lines, are critical for efficient and sustainable urban development. They reduce traffic congestion, lower carbon emissions, and improve the quality of life for urban residents. Metro lines also support economic growth by facilitating the movement of people and goods within cities.
Conservation of Aarey Colony (Option C) is an important environmental initiative, but it does not directly align with the goals of SDG 9. While conservation efforts are crucial for environmental sustainability, SDG 9 specifically focuses on infrastructure development, industrialization, and innovation. Conservation efforts are more closely related to other SDGs, such as SDG 15 (Life on Land) and SDG 13 (Climate Action).
Therefore, the correct answer is (D) Only (A) & (B). These options represent advancements in SDG 9 by contributing to sustainable energy infrastructure and efficient urban transportation systems, which are key components of the goal. Conservation efforts, while valuable, do not directly contribute to the specific objectives of SDG 9.