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Subject :NSO    Class : Class 5

Deep inside the Earth there is hot molten rock called 'P'. This comes up and collects in a chamber. When 'P' erupts through the Earth's surface, it is called 'Q'. On cooling, it becomes 'R'. The hollow top of the volcano that is shaped like a bowl, is called a 'S'.
Which of the following is incorrect regarding the above passage?

A 'Q' is magma and 'P' is lava. When magma is below the Earth's surface it is called lava.
B 'R' are igneous rocks. The first rocks to form on the Earth were igneous rocks.
C 'S' is a vent, an opening or a crack in the crust of the Earth.
D Both A and C.

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