As of March 2022, the 407th decimal place of Pi is 4. Therefore, the answer is D).
How to determine Pi digits?
Pi (π) is an irrational number, which means that its decimal representation goes on forever without repeating. Therefore, it is impossible to say with certainty what digit is found at any particular decimal place of Pi.
Some educated guesses can be made based on the first few hundred decimal places of Pi. The first few hundred decimal places of Pi are mostly composed of the digits 0, 1, and 2. This is because these digits are the most common digits in the decimal system.