Solve this and please don't give any link...

12. (AIPMT 2007, AIIMS 2008) A hollow cylinder has a charge q C within it. 
 

 

If $\varphi$ is the electric flux in units of Vm associated with the curved surface B, the flux linked with the plane surface A in units of Vm will be 

$$\begin{gathered} \left(a\right) \frac{q}{2{\epsilon }_0} \left(b\right) \frac{\varphi }{3} \\ \left(c\right) \frac{q}{{\epsilon }_0} - \phi \left(d\right) \frac{1}{2} \left( \frac{q}{{\epsilon }_0} - \varphi \right) \end{gathered}$$