$A$ $1 \text{ N}$ pendulum bob is held at an angle $\theta$ from the vertical by a $2 \text{ N}$ horizontal force $F$ as shown in the figure. The tension in the string supporting the pendulum bob (in newton) is

  • A
    $\cos \theta$
  • B
    $\frac{2}{\cos \theta}$
  • C
    $\sqrt{5}$
  • D
    $1$

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