Basic capitalization rules
The first letter of a sentence.
I, the pronoun.
The first letter of a proper noun or a proper adjective:
Ramesh, India, Indian etc.
God, He (for God), Almighty etc.
Starting of a direct narration:
I asked, "How old are you?"
Long names and titles:
Joan of Arc;
National Council for Educational Research and Training;
The People's Republic of China;
A New Method for Solving the Nonlinear Boundary Value Problem around an Aircraft Wing.