In the following question I have filled in the correct answer for i:

[![enter image description here](https://i.stack.imgur.com/18TYU.png)](https://i.stack.imgur.com/18TYU.png)

For ii I thought that should be three for Q and two for P,

For Q there are three distinct enviroments for the C atoms:

* $\ce{-\mathbf{C}H2-{}}$
* $\ce{-\mathbf{C}H2-C=C-{}}$
* $\ce{-\mathbf{C}=C<}$

and for P there are two:

* $\ce{-\mathbf{C}H2-C=C-{}}$
* $\ce{-\mathbf{C}=C<}$

Howevere the correct answer is 4 for both P and Q.

So then I thought maybe they want me to include the splitting of the peaks but in both P and Q there is too much splitting for this to be the case...

Why is the correct answer 4?