Ultrasound Generate due toA. Piezoelectric effect B. InterferenceC. Total internal reflection D. Inverse piezoelectric effec

Ultrasound is generated due to both A. Piezoelectric effect and D. Inverse piezoelectric effect.

Here's a step-by-step explanation:

1. The Piezoelectric effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress. This is how ultrasound probes generate ultrasound waves. When an electric current is applied to these materials, they vibrate, producing the ultrasound waves.

2. The Inverse Piezoelectric effect is the converse of the Piezoelectric effect. It refers to the change in dimensions of the piezoelectric material when an electric field is applied to it. This is how the ultrasound machine receives the ultrasound waves. When the waves come back to the probe after being reflected off the tissues, they cause the piezoelectric material to vibrate, producing an electric current that the machine can interpret.

So, the correct answer is both A and D.