What was the original number of subjects enumerated in the Concurrent List (List III) of the Seventh Schedule to the Constitution of India for legislative purposes?

Originally, there were $47$ items/subjects enumerated in the Concurrent List of the Indian Constitution. Through subsequent amendments (such as the $42^{\text{nd}}$ Amendment Act of 1976), this number was expanded to $52$ subjects. Among the options given, $47$ reflects the classic foundational count.