Amplitude of oscillation of tool in USM ranges between?

• A. 0.1-10 ‚âà√≠¬¨‚à´m
• B. 10-40 ‚âà√≠¬¨‚à´m
• C. 50-100 ‚âà√≠¬¨‚à´m
• D. 100-1000 ‚âà√≠¬¨‚à´m