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In the given figure, If \( \mathrm{OA}=5 \mathrm{~cm}, \mathrm{AB}=8 \mathrm{~cm} \) and \( \mat...

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In the given figure, If \( \mathrm{OA}=5 \mathrm{~cm}, \mathrm{AB}=8 \mathrm{~cm} \) and \( \mathrm{OD}= \) is perpendicular to \( \mathrm{AB} \), then \( \mathrm{CD} \) is equal to:
a. \( 2 \mathrm{~cm} \)
b. \( 3 \mathrm{~cm} \)
c. \( 4 \mathrm{~cm} \)
d. \( 5 \mathrm{~cm} \)
a. \( 2 \mathrm{~cm} \)
b. \( 3 \mathrm{~cm} \)
c. \( 4 \mathrm{~cm} \)
d. \( 5 \mathrm{~cm} \)