How To Introduce Your Academic Credentials

Hi all,

I hear a lot of people say I graduated with the degree of Bachelor of Science in accounting.

a) What should we say in place of "with", "I graduated with..." because it sounds like they personified "Bachelor of Science" who graduated with them. Does one have a degree IN or have a degree OF Bachelor of Science?

b) "I studied AB Political Science."
Does one study Political Science or does one study Bachelor of Arts Political Science?

c) "I graduated with a course of nursing"
Can we just simply say "I graduated nursing"?

d) "I graduated with a course of Bachelor of Science of Business Administration"
Can we say "I am a graduate of BS Business Administration"?
"I am a graduate of Business Administration with a degree in/of Bachelor of Science"

Thanks!