Get the DateSet Object's 8th table will give you the 8th 
query records.

DataSet ds = new DataSet();
DataTable dt = new DataTable();
dt=ds.Tables[8];

Now dt will have the records returned by the 8th query

I need some answers...

the index starts from 0.
ds.tables[7]

From SP we want the 8th query.....

so that we can be access by 

DataSet ds = new DataSet();
DataTable dt = new DataTable();
dt = ds.Tables[8]; //As Index Starts from 0th Index....

Now dt will have the records returned by the 8th query..