<prompt> Acute radiation hepatic damage is most marked between -1-7 days7-21 days21-40 days40-100 days  <response>: Ans. is d i.e., 40-100 days o Acute radiation damage normally affects rapidly proliferating tissue : - i Hematopoietic tissue Latent period 2-3 weeks. ii Epithelium of GIT -- Latent period 3-5 days. iii Lymphoid tissue o Acute radiation damage also affects the CNS Latent period 15 minutes to 3 hours. o Hepatic radiation damage is not acute, it is subacute and appears within 90 days. 