Identify the correct pairs in which the chemical substance given is correctly matched its use

<mrow data-mjx-texclass="ORD">

  <mi data-mjx-auto-op="false">Cl</mi>

</mrow>

<mn>2</mn>

<mrow data-mjx-texclass="ORD">

  <mi data-mjx-auto-op="false">Cl</mi>

</mrow>

<mn>2</mn>

<mrow data-mjx-texclass="ORD">

  <mi mathvariant="normal">I</mi>

</mrow>

<mn>2</mn>

<mrow data-mjx-texclass="ORD">

  <mi mathvariant="normal">O</mi>

</mrow>

<mn>5</mn>

<mrow data-mjx-texclass="ORD">

  <mi mathvariant="normal">I</mi>

</mrow>

<mn>2</mn>

<mrow data-mjx-texclass="ORD">

  <mi mathvariant="normal">O</mi>

</mrow>

<mn>5</mn>

<mrow data-mjx-texclass="ORD">

  <mi mathvariant="normal">O</mi>

</mrow>

<mn>3</mn>

<mrow data-mjx-texclass="ORD">

  <mi mathvariant="normal">O</mi>

</mrow>

<mn>3</mn>

Observe the following ions

$$ \mathrm{V}^{2+}, \mathrm{Zn}^{2+}, \mathrm{Cu}^{2+}, \mathrm{Fe}^{2+}, \mathrm{Fe}^{3+}, \mathrm{Ti}^{3+}, \mathrm{Sc}^{3+}, \mathrm{Ti}^{4+}, \mathrm{Ni}^{3+}, \mathrm{Co}^{3+}, \mathrm{Cu}^{+} $$

How many ions in the above list have zero magnetic moment?

Identify the correct set for $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ ion.

(Hybridisation of $\mathrm{Co}^{3+}$, type of complex, number of unpaired electrons in the complex ion respectively.)

Identify the correct statement from the following.

A. Glyptal is made from the monomers ethylene glycol and phthalic acid.

B. Bakelite is used in making electrical switches.

C. Nylon 2-nylon-6 is a biodegradable polymer.