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The radiation weighting factor for alpha particles is 20, and the tissue weighting factor for the lungs is 0.12. If the lungs receive an absorbed dose of
0.2 Gy, from exposure to alpha particles, what is the effective dose in sievert?
A. 0.48 Sv
B. 4.8 Sv
C. 48.0 Sv
D. 480.0 Sv