TS Police SI Model Paper 2

In the question below is a statement followed by two conclusions numbered I and II. You have to assume everything in the statement to be true, then consider the two conclusions together and decide which of them logically follows beyond a reasonable doubt from the information given in the statement.
Statement:
Only science students are permitted to attend the conference, other than science students no one is permitted.
Conclusions:
I. All students present at the conference are science students.
II. Those who do not have a science background are not allowed in the conference