1.

What is an endoscope?

A. It is an optical instrument used to see inside the alimentary canal
B. it is device which is fitted on the chest of the patient to regularize the irregular heart beats
C. It is an instrument used for examining ear disorders
D. It is an instrument for recording electrical signals produced by the human muscles.
Answer» B. it is device which is fitted on the chest of the patient to regularize the irregular heart beats


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