Match the Column I (energy of capacitor) with Column II (value) and select the correct answer from the codes given below.
A capacitor `C_1` of capacitance C is charged to a potential difference `V_0`. The terminals of the charged capacitor are then connected to an uncharged capacitor `C_2` of capacitance C/2.
| Column I | Column II |
| A. Final energy of capacitor `C_1` | p.`-(1'/'6) CV_0^2` |
| B. Final energy of capacitor `C_2` | q.`(1'/'6) CV_0^2` |
| C. Final energy of the system | r. `(1'/'3) CV_0^2` |
| D. Change in energy on joining the capacitors | s.`(2'/'9) CV_0^2` |
| | t. `(1'/'9)CV_0^2` |
Options:
(a) A-p B-q C-r D-t
(b) A-s B-t C-r D-p
(c) A-t B-s C-r D-p
(d) A-p B-q C-r D-s