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Q 1225812761.     A circular arc `PQ` of radius `1 ` subtends on angle of `x` radians, `0 < x < π` as shown in the adjacent figure. The point `R` is the Intersection of the two tangent lines at points `P` and `Q` of the arc.`O` is the centre of the circle from which the arc is cut. Let us define the following functions as function of `x`:
`S ( x )` = area of the sector `OPQ`

`T ( x ) =` area of the triangle `PQR`

`U ( x ) =` area of the shaded region

.The value of the limit ` lim_(x→0^+) (U(x))/(T(x)) =`


A

`2/3`

B

`3/2`

C

`1`

D

`1/2`

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