The difference of the average production of fertilizers in the first three years and the average production in the last three years (in lakh tonnes) is

• A. <table><tr><td rowspan="2"> 2 </td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"></td></tr><td align="center">3</td></table>
• B. <table><tr><td rowspan="2"> 8 </td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"></td></tr><td align="center">3</td></table>
• C. <table><tr><td rowspan="2">4 </td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"></td></tr><td align="center">6</td></table>
• D. <table><tr><td rowspan="2"> 3 </td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"></td></tr><td align="center">3</td></table>