I have an excel sheet with two columns and I want to convert it into json.

I want to convert this into a json format like this:
{"A": "This is a Sentence", "B": "1"},
{"A": "This is a Sentence", "B": "2"},
{"A": "This is a Sentence", "B": "3"},
{"A": "This is a Sentence", "B": "4"}
I tried using this command:
data= df.to_json (r'C:\Users\Admin\df_json.json',orient='split')
but it generates something like this:
[{"A": "This is a Sentence", "B": "1"},{"A": "This is a Sentence", "B": "2"},{"A": "This is a Sentence", "B": "3"},{"A": "This is a Sentence", "B": "4"},]