Most Challenging Degree Subjects (2023) ✈️ Aerospace Engineering ⚖️ Law 💼 Chartered Accountancy 🏛️ Architecture 🔬 Chemistry 👨‍⚕️ Medicine 💊 Pharmacy 🧠 Psychology 📊 Statistics 👩‍⚕️ Nursing 🌌 Physics 🚀 Astrophysics 🏥 Biomedical Engineering 🔭 Astronomy 🦷 Dentistry Source: Ranked by Oxford Royale Academy.