Correct option is D
Place value of 6 in the number 56431: The place value of 6 is based on its position in the number. In 56431, 6 is in the thousands place. Therefore, the place value of 6 = 6×1000=6000
Face value of 4 in the number 56431: The face value of a digit is the digit itself, regardless of its position. So, the face value of 4 is 4
Difference between the place value of 6 and the face value of 4 = 6000−4=5996
Hence, the correct answer is (d).