Two shafts 'A' and 'B' are made of same material. The shaft 'A' is solid and has diameter D. The shaft 'B' is hollow with outer diameter D and inner diameter $$\frac{{\text{D}}}{2}$$. The strength of hollow shaft in torsion is _________ as that of solid shaft.
A. $$\frac{1}{{16}}$$
B. $$\frac{1}{8}$$
C. $$\frac{1}{4}$$
D. $$\frac{{15}}{{16}}$$
Answer: Option D
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