With reference to the structure of our solar system and the universe, consider the following statements: 1. The main source of energy generated at the core of the Sun is nuclear fusion, in which four hydrogen nuclei combine to form one helium nucleus due to extremely high temperature and pressure. 2. The Asteroid Belt is primarily located between the orbits of Mars and Jupiter, where small rocky bodies revolve around the Sun, and the largest body in this region is 'Ceres', which is also considered a dwarf planet. 3. The 'Oort Cloud' is a vast spherical shell of icy bodies located at the outermost edge of the solar system, considered to be the origin site of long-period comets. 4. A light-year is a unit of measuring time, which indicates the distance light travels in a vacuum in a period of one year. Which of the above statement(s) is/are completely true?

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Gaurav Shrivastava · Accepted Answer

Statements 1, 2 and 3 are completely true. Nuclear fusion of hydrogen into helium occurs in the core of the Sun due to extreme temperature and pressure, which is the source of its energy. The asteroid belt is located between Mars and Jupiter and its largest body is 'Ceres'. The Oort cloud is the source of comets located at the edge of the solar system. However, statement 4 is false because a 'light-year' is a unit of measuring distance, not time.

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With reference to the structure of our solar system and the universe, consider the following statements:

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