Planning on focusing more on Developmental Psychology for a masters afterwards, and i got into the social sciences at mac- which would be more relevant the Social Psychology program or the Psych neuro and behaviour program? if you could help explain how the pnb program would relate to it more that'd be appreciated. Thanks!

If you're interested in research, you are far better suited for the PNB stream, since on top of the wide variety of child development courses (Psych 2AA3/3GG3 - child development, Psych 3B03 - special populations, 3AB3 - Adolescent psychology, 3II3 - Cognitive Development, 3HH3 - infant development, plus a new third year pnb development research course that is only open to PNB students), there are also opportunities to do research or volunteer in research labs and get hands on experience in clinical or lab-based research with professors, which is infinitely valuable if you're trying to get into grad school because research experience is a key requirement for most schools.

I myself was interested in the development stream when I entered PNB, and I really liked the abundant amount of courses that I was able to take, and most of them are taught by experienced professors who actually do research in child development. I even did an independent library study with Dr. Landry, with a focus on autistm diagnosis methods.

tldr; While you can take any of the developmental psych courses (except the pnb development research lab) if you're simply in social psych, you won't have the benefit of hands on experience or access to child development researchers, not to the extent that the PNB program provides.