Scraper is not considered a principal tool of the early Stone Age. Hand axes, cleavers, and choppers are examples of tools that were commonly used during the early Stone Age for various purposes, including cutting and processing materials. Scraper tools are more commonly associated with the later stages of the Stone Age and were used for tasks like scraping and smoothing surfaces.

Answer: A) 1954 Explanation: The Bharat Ratna is the highest civilian award of the Republic of India. Instituted in 1954, the award is conferred "in recognition of exceptional service/performance of the highest order", without distinction of race, occupation, position, or sex.