Hello Aspirant,
You can only enter the details the registration form asks for. So, you need to enter only the 12th scores in the form.
Navy form asks for each mark in subjects like English, Mathematics, Physics, Biology, Chemistry, etc, or the subjects you had in your 12th standard.
To learn more about Navy recruitment click
https://www.careers360.com/careers/articles/how-to-join-indian-navy-after-12th-counar
I hope it helps. Thank you.
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