The answer is labels on lead-based paint
Lead is highly toxic metal and it is very strong poison. Lead poising takes place when lead builds up in the body. A little amount of lead can also cause various health problems.
Labels on lead-based paint do not prevent lead poisoning as much as advised to not using such product.
Instead of using lead-based paint, people could use safer products such as titanium-white based paint, which is proved to be less toxic.
Thus, option (A) is correct answer i.e. labels on lead-based paint is not among the current strategies which is used to prevent lead poisoning.
