ᴡʜᴀᴛ ɪs ʀᴇғʀᴀᴄᴛɪᴠᴇ ɪɴᴅᴇx
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the ratio of the velocity of light in a vacuum to its velocity in a specified medium.
kaha ja ra h?
akele akele...
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Answer:
A physician, medical practitioner, medical doctor, or simply doctor, is a professional who practices medicine, which is concerned with promoting, maintaining, or restoring health through the study, diagnosis, prognosis and treatment of disease, injury, and other physical and mental impairments.
tnx for points....
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