Which of the following is the correct syntax for declaring a SUBTYPE?

Which of the following is the correct syntax for declaring a SUBTYPE? Correct Answer SUBTYPE subtype_name IS TYPE subtype_range

The correct way to define a SUBTYPE is the syntax shown in option d. For example, if we want to define a SUBTYPE of STD_LOGIC with 3 values only like X, 0 and 1. We can define it as SUBTYPE my _ subtype IS STD_LOGIC RANGE ‘X’ TO ‘1’.

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