I Am Confused ... Help Me Chose My Masters

[TrollHunter]

I Am From India And Am A Final B.Sc Student .. Doing Maths.Physics And Computers. And Am Planning To Become A College/University Professor (Preferably Physics)

Am Also Planning To Study Abroad.

My Fields Of Interest Lies In

Master of Science in Physics and Astrophysics
Master of Science in High Energy Physics
Master of Science in Nanotechnology and Low-Temperature Physics
Master of Science in Electronic Engineering and Physics
Master of Science in Physics and Applied Physics
Master of Science in Laser Physics

There Are Some Things I Am Not Certain About.And I Would Be Glad If U Guys Can Help Me Out.

Seriously ... I Mean It.

So My First Question Goes Like This. Am I Eligible To Work As A College/University Professor (Anywhere In The World Including India) If I Get A PhD In Any Of The Following?

My Second Question Is ... Which One Of The Above U Think Has Brighter Future. Am Basically Interested In All Of Them. So I Myself Cant Decide. So I Decided To Go For Whatever Have A Good Future, In Case I Want To Work As Something Else Other Than A College Professor (Which Is Highly Not Likely, But Why Take Chances)