In ABC, C = 90 and AB = c, BC = a, CA = b; then the value of (cosec B cos A) is

• A. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>c </center></td><td rowspan="2"></td></tr><td align="center">ab</td></table>
• B.
• C. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>b </center></td><td rowspan="2"></td></tr><td align="center">ca</td></table>
• D. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>a </center></td><td rowspan="2"></td></tr><td align="center">bc</td></table>
• E. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>bc</center></td><td rowspan="2"></td></tr><td align="center">a </td></table>