Cassava (Manihot esculenta) is a perennial woody shrub, justifying pair I. Ginger (Zingiber officinale) is a herbaceous plant with a pseudostem formed by leaf sheaths, making pair II correct. Malabar spinach (Basella alba) is a herbaceous climber, so pair III is correctly matched. Mint (Mentha) is a perennial herb, not an annual shrub, thus pair IV is incorrectly matched. Papaya (Carica papaya) is generally considered a large herbaceous plant or a small tree, often described as a shrub or tree-like herb, with a soft, hollow stem, making pair V debatable but often classified as a shrub for simplicity in such contexts. Considering the common classifications and the likely intent of the question, three pairs are generally considered correctly matched.