div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=for-details-including-syllabus-visit-ibab-htmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: For details including syllabus visit IBAB loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentssitereader031viewer20220120226169c1c211a7b741a34b04dehtml5thumbnails1jpg width=140 height=200 divpCURRENT SCIENCE VOL 108 NO 4 25 FEBRUARY 2015 738pdiv