Gynaecology & Obstetrics In “obsetrics ultra sound” commonly employed range of frequency is:- A 3.5-5 MHz (Megahez) B 5 - 7.5 MHz C 1 - 2.5 MHz D 8 - 10 MHz 💡 Explanation In "obsetrics ultra sound" commonly employed range of frequency is:- ✓ Correct Answer: A. 3.5-5 MHz (Megahez)