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: Gynaecology & Obstetrics
Investigation contraindicated in antenatal expectant mother is : 
Select and explain. 
A. X-rays, B. Ultrasound, C. Urine examination, D. Blood examination
A: X-rays
Answer: A: X-rays 
Explanation: X-rays