Hello Mohan,

If you would have provided more details about the college you are referring to, we could have provided more details on your doubt.  Please do mention the college name either in your next qna post or atleast mention it in the comments section below to seek more help.

Also, include TAGS in every QnA post.  The tags will categorise the issue into relevant fields and the experts in those fields could clear your doubts.

Hope it helps, Thanks