This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ULTRASOUND, Subject name: Radiology
Thyroid malignancies appear on USG as 
Select and explain. 
A. Hypoechoic, B. Anechoic, C. Hyperechoic, D. Isoechoic
A: Hypoechoic
Answer: A: Hypoechoic 
Explanation: On sonography, thyroid tumors are solid,hypoechoic masses.