Q.

Ultrasound with frequencies ranging from

A. -30 kHz to 3000 kHz
B. 20 kHz to 2000 kHz
C. 1-0 kHz to 1000 kHz
D. 40 kHz to 4000 kHz
Answer» B. 20 kHz to 2000 kHz
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Pharmacognosy 4

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