Neco Model Questions Vol1 2021 Biology Question 9

A taxonomist studies five insect species (A, B, C, D, E) using two morphological characters: wing venation (present / absent) and antenna segmentation (≤10 segments / >10 segments). The observations are:\n\n- A: wing present, antenna >10\n- B: wing present, antenna ≤10\n- C: wing absent, antenna >10\n- D: wing absent, antenna ≤10\n- E: wing present, antenna >10\n\nThe taxonomist groups the species into genera such that each genus is monophyletic for both characters (all species in a genus share the same state for each character). Additionally, each family must contain at least two genera, and each family must contain at least one genus that includes more than one species. What is the maximum possible number of families that can be formed under these rules?