In eukaryotic cell cycle, cell fusion experiments show that [AIEEE 2004]

• A. When an S-phase cell is fused with a \[{{G}_{1}}-\]phase cell, \[{{G}_{1}}-\]phase cell is stimulated to synthesize DNA
• B. When an S-phase cell is fused with a G1-phase cell
• C. When a \[{{G}_{1}}-\]phase cell is fused with a \[{{G}_{1}}-\]phase cell, DNA synthesis is induced in both \[{{G}_{1}}\] and \[{{G}_{2}}\] phase cells
• D. When a \[{{G}_{1}}-\]phase cell is fused with an M-phase