Assertion : `X` - rays can penetrate through the flesh but not through the bones.
Reason : The penetrating power of `X` - rays depends on voltage.

Options

A. If both assertion and reason are ture and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reson are false.

Answer

B

Explanation

Hardness penetrating power of X- ray depends upon accelerating voltage applied across X-ray tube.Characterristic X-ray ralte to the meaterial of target . X-ray can't pass through matter of heavier element like bones (which contain oxygen. Hydrogen and carbon )