Which of the following statements is incorrect? (a) \( \mathrm{Fe}^{2+} \) ion also gives blood ...

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Which of the following statements is incorrect?
(a) \( \mathrm{Fe}^{2+} \) ion also gives blood red colour with \( \mathrm{SCN}^{-} \)ion.
(b) Cupric ion reacts with an excess of ammonia solution to give a deep blue colour of \( \left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+} \) ion.
(c) \( \mathrm{Fe}^{3+} \) ion gives blood red colour with \( \mathrm{SCN}^{-} \)ion.
(d) On passing \( \mathrm{H}_{2} \mathrm{~S} \) into \( \mathrm{Na}_{2} \mathrm{ZnO}_{2} \) solution, a white ppt. of \( \mathrm{ZnS} \) is formed.
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