Uni of Man Pol IR vs Pol Social Anthropology

My dream is to apply for University of Manchester’s Politics and International Relations course, its requirements are AAA, and I have A- Sociology A- English Lit B- History, and I feel like they would want an A in History rather than Sociology. I’ve been looking at the other Politics courses they offer like Pol and Sociology and Social Anthropology, and those requirements are ABB. I would be willing to do Politics and Social Anthropology, because I think thats the most similar to Pol IR. But the main thing for me is I love the Pol IR course and Social Anthropology isn’t exactly what i want in terms of a course but its the closest to what I would want. I dont know if I should do 2 choices for Manchester ( dream uni btw) one for Pol Social Anthropology, and one for Pol IR, or just apply for Pol SA and hopefully defer to Pol IR in uni ( is that even possible?) or should i just hope for the best and apply for Pol IR, even though I donr meet the entry requirements and UCAS says I have a 49% chance of getting accepted. ALSOOOO my Personal Statement is really strong all of my teachers have said, does that play a part or not?