Concept:Use the double possessive form with a possessive pronoun after "of" when it follows a determiner like "those."
Explanation:The phrase "Those our flowers" is grammatically incorrect in English.
Instead, we need a double possessive: "those flowers of ours."
Here, "ours" is a possessive pronoun, so "of ours" correctly means "belonging to us."
Option B uses "her," which is a possessive determiner, not a possessive pronoun; the correct pronoun would be "hers."
Option C contains "her's," which is always wrong because possessive pronouns never take an apostrophe.
Answer:A. Flowers of ours.