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Question : [A]: For accurate measurement of Doppler echocardiography the frequency of ultra- sound waves should be noticed.[R]: Ultrasound beam can be as close to par- allel.

Answer»

If both A and R are TRUE and R is the correct explanation of A
If both A and R are true but R is not the correct explanation of A
If A is true and R is FALSE
If both A and R are false

Answer :B


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