Compatibility summary
You will need a travel adapter in Antigua and Barbuda; plug types used there differ from India.
Plug comparison
India plug types: C D M
Antigua and Barbuda plug types: A B
There is no common plug type between India (C D M) and Antigua and Barbuda (A B). You need a travel adapter.
Voltage comparison
India: 230V, 50Hz
Antigua and Barbuda: 230V, 60Hz
Voltage difference is within a range many devices tolerate; check your appliance label.