Assertion A : If A, B, C, D are four points on a semi-circular arc with centre at 'O' such that
$\overrightarrow{\mathrm{AB}}+\overrightarrow{\mathrm{AC}}+\overrightarrow{\mathrm{AD}}=4 \overrightarrow{\mathrm{AO}}+\overrightarrow{\mathrm{OB}}+\overrightarrow{\mathrm{OC}}$
Reason R : Polygon law of vector addition yields
$\overrightarrow{\mathrm{AB}}+\overrightarrow{\mathrm{BC}}+\overrightarrow{\mathrm{CD}}+\overrightarrow{\mathrm{AD}}=2 \overrightarrow{\mathrm{AO}}$
In the light of the above statements, choose the most appropriate answer from the options given below :
Correct Option: , 4
Polygon law is applicable in both but the equation given in the reason is not useful in explaining the assertion.
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