Which of the following is NOT a Facebook ad policy no-no?

The choice of "informative text" as the correct answer indicates an understanding of Facebook's ad policies, which emphasize transparency and helpful information. Informative text is typically allowed as it provides clarity about the product or service being advertised. It can enhance user understanding and engagement by clearly conveying the benefits or features without misleading or exaggerating claims.

In contrast, misleading buttons, before-and-after images, and shock and scare images are all restrictions under Facebook's advertising guidelines. Misleading buttons can create confusion, leading users to click without understanding the actual action they are taking. Before and after images can enforce unrealistic expectations and are often associated with misinformation regarding the effectiveness of products, particularly in sensitive health and beauty sectors. Shock and scare images utilize fear tactics to manipulate emotions, which is against the platform's policies to ensure a safe and trustworthy environment for users.

Thus, since informative text serves to enhance user knowledge and engagement without violating guidelines, it stands out as the exception among the specified options.