$A$ straw of circular cross-section of radius $R$ and negligible thickness is dipped vertically into a liquid of surface tension $T$. If the contact angle between the liquid and the straw material is $53^{\circ}$, what is the force acting on the straw due to the surface tension of the liquid? (Given: $\cos 53^{\circ} = 0.6$)

  • A
    $\frac{12 \pi R T}{5}$
  • B
    $\frac{6 \pi R T}{5}$
  • C
    $\frac{4 \pi R T}{5}$
  • D
    $\frac{3 \pi R T}{5}$

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