Incorrect answer on trivia question

The question asks something along the lines of “According to Moore’s law, the number of transistors in a circuit doubles every how many years?”

The answer is two year, but I was marked as incorrect and told it is every year.

The only Moore’s law question in the database is

“Moore’s law originally stated that the number of transistors on a microprocessor chip would double every…”

Originally in 1965 Moore described the doubling happening every year, only in 1975 changing it to every two years. As the question is asking for the original doubling time, the answer of “year” is correct.