Hello Dhasa, Greetings!
Let me help you.
B.A. in Defence Studies majorly involves geopolitics, economics of defence, conflict management, nuclear policies etc. It generally includes all domestic and international issues that affect national security and interests.
On the other hand, B.Sc. in Military Defence Studies is focused on implementing the national strategic and defence policies in the military forces. Area of study involves war strategies, defence techniques etc.
The better stream actually depends upon the interest of the student as both stream has good scope.
Thank you, hope this helps.
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