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What is the main source of energy of the sun?a)Nuclear fission of heavier unstable elements in the sunb)Combustion of pure carbon present in the sunc)Gravitational energy liberated during the slow contraction of the sun.d)Nuclear fusion of lighter elements in the sun.Correct answer is option 'D'. Can you explain this answer? for Class 12 2026 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about What is the main source of energy of the sun?a)Nuclear fission of heavier unstable elements in the sunb)Combustion of pure carbon present in the sunc)Gravitational energy liberated during the slow contraction of the sun.d)Nuclear fusion of lighter elements in the sun.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the main source of energy of the sun?a)Nuclear fission of heavier unstable elements in the sunb)Combustion of pure carbon present in the sunc)Gravitational energy liberated during the slow contraction of the sun.d)Nuclear fusion of lighter elements in the sun.Correct answer is option 'D'. Can you explain this answer?.

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