Final answer:
The first NBCE exam took place in 1965 with 1200 students taking the exam to standardize chiropractic professional assessment.
Step-by-step explanation:
The first NBCE exam was administered in the year 1965. The National Board of Chiropractic Examiners (NBCE) is an independent agency established for the purpose of standardizing the examination of chiropractic professionals to ensure public safety. In that initiating year, 1200 students sat for the exam which has since become a standard component for chiropractors seeking licensure in the United States.