Here you go. Obviously it doesn't return any rows for your sample data, but if it did, you could join back to A if you need the student name.

John

SELECT

B.StudentID

FROM

B

JOIN

TblData d ON B.ClassID = d.ClassID AND B.SectionID = d.SectionID

GROUP BY

b.StudentID

HAVING

COUNT(*) = (SELECT COUNT(*) FROM TblData)