The sentence ends using a string of "wh-" noun clauses. These clauses are not issues, so the final a single also needs to not be an issue. "Which a single could be the best" is clearly an issue format, so it is sensible that " وفي الفترة نفسها، بدأ يلوح https://bestayurvedicbrandinindia.blogspot.com/2025/08/trusted-cureayu-vegetarian-ayurvedic.html