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A small sphere of mass $m$ is suspended by a light and inextensible string of length $l$ from a point $O$ fixed on a smooth inclined plane of inclination $\theta $ with the horizontal. The sphere is moving in a circle on the incline as shown. If the sphere has a velocity $u$ at the top most position $A$ . Then,

• A
  the tension in the string as the sphere passes the $90^o$ position $B$ equal to $m\left( {\frac{{{u^2}}}{l} - 2g\sin \theta } \right)$
• ✓
  the tension in the string at the bottom most position $C$ equal to $m\left( {\frac{{{u^2}}}{l} + 5g\sin \theta } \right)$
• C
  the tension in the string as the sphere passes the $90^o$ position $B$ equal to $m\left( {\frac{{{u^2}}}{l} - 3g\sin \theta } \right)$
• D
  the tension in the string at the bottom most position $C$ equal to $m\left( {\frac{{{u^2}}}{l} - 5g\sin \theta } \right)$