This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
The usual dose of radiation delivered to point A in cervical cancer management is 
Select and explain. 
A. 2000 to 4000, B. 4000 to 6000, C. 7000 to 8000, D. 8000 to 10000
C: 7000 to 8000
Answer: C: 7000 to 8000 
Explanation: The usual doses delivered are 7,000 to 8,000 cGy to point A (defined as 2 cm superior to the external cervical os and 2 cm lateral to the internal uterine canal) and 6,000 cGy to point B (defined as 3 cm lateral to point A), limiting the bladder and rectal dosage to less than 6,000 cGy.To achieve this level, it is necessary to adequately pack the bladder and bowel away from the intracavitary sourceReference: Novak's gynaecology; 14th edition; Chapter 35; Uterine cancer