Compare three plans, A2, A3 and A4. Please explain which is the best from the aspects of orientation, lighting and geomantic omen. Thank you. Reward 50 points.

Let's not talk more. If it is a small villa, A3 is more suitable than A2. The WC across the door will move to the next bedroom, which is good for your children to live in. If it is a building in the middle of the building, A2 is more suitable than A3, so you must buy the same apartment with the same building orientation. This can't be guaranteed, but it can't be bad.