MCQ
Which of the following ions is paramagnetic
- A$C{u^ + }$
- B$Z{n^{ + 2}}$
- ✓$T{i^{ + 3}}$
- D$T{i^{ + 4}}$

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$(A)$ $\left. Na _{4}\left[ Fe ( CN )_{5} NOS \right)\right]$
$(B)$ $Na _{4}\left[ FeO _{4}\right]$
$(C)$ $\left[ Fe _{2}( CO )_{9}\right]$