Which of the following header file includes definition of cin and cout

1.	Which of the following header file includes definition of cin and cout?
A.	<i class="cpp-code">istream.h</i>
B.	<i class="cpp-code">ostream.h</i>
C.	<i class="cpp-code">iomanip.h</i>
D.	<i class="cpp-code">iostream.h</i>
Answer» E.

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Which of the following header file includes definition of cin and cout?

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