A simple pendulum of length L and mass (bob) M is oscillating in a plane about a vertical line between angular limits \[-\varphi \] and\[+\varphi \]. For an angular displacement\[\theta (|\theta |<\varphi )\], the tension in the string and the velocity of the bob are T and v respectively. The following relations hold good under the above conditions [IIT 1986; UPSEAT 1998]

• A. \[T\cos \theta =Mg\]
• B.  \[T-Mg\cos \theta =\frac{M{{v}^{2}}}{L}\]
• C. \[2\pi nt+\alpha \] 
• D. \[T=Mg\cos \theta \]