To solve this problem, we need to identify which plant has perigynous flowers. Let's analyze the options:$\newline \bullet$Guava:$\newline$ - Guava flowers are typically hypogynous, meaning the ovary is superior and other floral parts are attached below it.$\newline \bullet$Cucumber:$\newline$ - Cucumber flowers are epigynous, meaning the ovary is inferior and other floral parts are attached above it.$\newline \bullet$China rose:$\newline$ - China rose (Hibiscus) flowers are hypogynous, with a superior ovary.$\newline \bullet$Rose:$\newline$ - Rose flowers are perigynous, meaning the ovary is partially embedded in the receptacle, and other floral parts are attached around it.$\newline$Therefore, the correct answer is Option 4: Rose, as it has perigynous flowers.