greetings selvam,
for admission in lady sri ram college for BA hons history, a score above 95.5 is safe. the cut-off may increase this this year but if you have got a score over 95, you will admission by the last few cut-offs.
pls refer to the cut-off of previous year for furthur information,
http://www.du.ac.in/cut-off.html
following is the syllabus for ba hons history:
http://du.ac.in/du/uploads/old-ug-courses/27412_History_BA_HONOURS.pdf
if you do not get admission in honours, you can go for the regular ba programme and choose history as you main subject.
hope this helps.
good luck.
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