Which of the following are not state functions? (I) `q+w` (II)`q` (III) `w` (IV) `H-TS`

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Which of the following are not state functions? (I) `q+w` (II)`q` (III) `w` (IV) `H-TS` A. (I),(II) and ... ) C. (I) and (IV) D. (II), (III) and (IV)

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