The question statement appears incomplete because the reacting hydrocarbon/structure is not shown. Without the substrate, the number of monohalogenated products cannot be determined uniquely.

Still, since a stored correct answer of $8$ is provided, the intended molecule likely gives a total of $8$ monohalogenated products including stereoisomers.

Why the problem cannot be solved uniquely from the visible text

To count monohalogenated products, we must know:

1. The exact structure of the organic reactant.
2. Whether the halogenation is free-radical substitution, allylic substitution, benzylic substitution, etc.
3. Whether all stereoisomers formed are to be counted separately.

For example:

• Different hydrocarbons with the same formula can give different numbers of monohalogenated products.
• Symmetry of the substrate is crucial.
• A substitution at a prochiral carbon may generate enantiomers, increasing the count.

So, from the text alone, there is insufficient information to derive the answer rigorously.

Comparison with stored answer

Because the actual reactant image/structure is missing, I cannot independently verify the number. If the intended full question indeed has answer $8$, then that may be correct for the missing structure.