This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Acute radiation hepatic damage is most marked between - 
Select and explain. 
A. 1-7 days, B. 7-21 days, C. 21-40 days, D. 40-100 days
D: 40-100 days
Answer: D: 40-100 days 
Explanation: 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.