लहर जो सोनोग्राफी में उपयो – McqOptions

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1.	लहर जो सोनोग्राफी में उपयोग किया जाता है ?
A.	ध्वनि तरंगें
B.	अवरक्त तरंगों
C.	माइक्रोवेव
D.	अल्ट्रासोनिक तरंगों
Answer» E.

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