<prompt> Which phase is most sensitive to radiotherapy in ceil cycle -G2G1SG2MLate S  <response>: Ans. is ci.e., G2M o Most sensitive phase of cell cycle - G2M interphaseo Most resistant phase of cell cycle - Late S phaseImportant facts about radiosensitivityo Dividing cells ar4e most sensitive to RTo Non-dividing cells are relatively resistant to RTo Hypoxic cells are resistant to RTo Phase of cell cycle most sensitive to RT - G2Mo Phase of cell cycle most resistant to RT - End of S phaseG2M G2 M G1 Early S Late So Phase of cell cycle in which radiation exposure leads to chromosomal aberration - G1o Phase of cell cycle in which radiation exposure leads to chromatid aberration - G2 