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Which of the following are the characterstics requried for the target to produce3 X-rays.
`{:("Atomic number","Low","High","Low","High"),("Melting Point","High","High","Low","Low"),(,(A),(B),(C),(D)):}`
A. (A)
B. (B)
C. (C )
D. (D)

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High atomic no. and high melting point.

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