Match the columns: ... ... <table class="mytable"> <tr> <td>Column I</td> <td>Column II</td> </tr> <tr> <td>(a) Endoplasmic reticulum</td> <td>(i) Cellular respiration</td> </tr> <tr> <td>(b) Free ribosome</td> <td>(ii) Osmoregulation and excretion</td> </tr> <tr> <td>(c) Mitochondrion</td> <td>(iii) Synthesis of lipids</td> </tr> <tr> <td>(d) Contratile</td> <td>(iv) Synthesis of non-secretory proteins</td> </tr> </table>