If the cell had diploid or 2n number of chromosomes at `G_(1)`, after S phase the number of chromosomes in the cell is ?

If the cell had diploid or 2n number of chromosomes at `G_(1)`, after S phase the number of chromosomes in the cell is ?
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If the cell had diploid or 2n number of chromosomes at `G_(1)`, after S phase the number of chromosomes in the cell is ? A. 2 n B. 4 n C. n D. 3n
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