Which of the Following Is Not an Implicit Object in JSP

Multiple Choice

Which of the following is not an implicit object in JSP?
I. Request.
II. Session.
III. Vector.
IV. In.

A) Both (I) and (II) above
B) Both (II) and (III) above
C) Both (I) and (III) above
D) Both (III) and (IV) above.