$(B)$ The oxides $NO _2 N _2 O , CO$ are neutral. Whereas the remaining oxides of $p$ block metals are acidic in nature.
Some of the $d$ block metal oxides are basic in nature, some of them acidic in nature where as the rest are amphoteric in nature.
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$(i) $ in filling a group of orbitals of equal energy, it is energetically preferable to assign electrons to empty orbitals rather than pair them into a particular orbital.
$(ii)$ When two electrons are placed in two different orbitals, energy is lower if the spins are parallel.are valid for


Assertion $(A)$ and the other is labeled as Reason $(R)$. Assertion $(A)$: $\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{Cl}$ is an example of allyl halide
Reason$(R)$: Allyl halides are the compounds in which the halogen atom is attached to $\mathrm{sp}^2$ hybridised carbon atom.
In the light of the two above statements, choose the $most \ appropriate$ answer from the options given below: