statements:All documents are files.Some files are papers.All papers are certificates.No certificate is a manuscript.Conclusions:I. At least some documents are papers.II. No manuscript is a document.III. At least some certificates are files.IV. No paper is a document.

Hi Sandhya
Among the given conclusions, only conclusion III holds True.
Make venn diagrams and you can easily negate conclusions I, II and IV.
Hope it helps.
If you have any further query, please post it again.

only 3 and either 1 or 4 follows

only 3 and either 1 or 4 follows. use syllogism rule it is easy

either 1 or 4 and 3 follow

3 follows along with either 1or 4 follows