Monazite is a source of

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(A) Monazite is a phosphate mineral containing rare earth elements and thorium. It is a significant natural source of helium $(He)$ gas,which is trapp

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$He$

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(A) Monazite is a phosphate mineral containing rare earth elements and thorium. It is a significant natural source of helium $(He)$ gas,which is trapped within the mineral lattice due to the radioactive decay of thorium and uranium present in it.

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