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Select the correct statement

[A].	The rate of disintegration of radioactive substances can be increased by applying intense heat to it	[B].	The half-life period depends upon the quantity of radioactive substance present.
[C].	The rate of disintegration is proportional to the number of atoms of the radioactive substance present	[D].	If the half-life period is T then after the elapse of time 2T all of the nuclei of the radioactive substances will have disintegrated.

Answer: Option C