Hello i need some advice

I have a table company and a table person .a person belongs to a company.

Now i´m told that not all person needs the same fields.

i will have 4 types of companies. So a person from company type a has 10
fields, a person from company type b has 5 fields, etc.
Also some fields are mandatory.

what is more efficient ?

I create table persona,personb,personc,persond

or i create a table person with all needed fields for all companies types.in
this case a lot of fields will be empty.

I´d like to hear your experience on this

Thank you

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