If the sum of the circumferences of two circles with radii $R_{1}$ and $R_{2}$ is equal to the circumference of a circle of radius $R ,$ then
If the sum of the circumferences of two circles with radii $R_{1}$ and $R_{2}$ is equal to the circumference of a circle of radius $R ,$ then
- A
$R _{1}+ R _{2} < R$
- B
$R _{1}+ R _{2} > R$
- C
Nothing definite can be said about the relation among $R _{1}, R _{2}$ and $R$
- D
$R _{1}+ R _{2}= R$
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