Which of the following is determined with the help of histogram?

Which of the following is true?

Which of the following is a prime number?

Which one of the following is NOT a measure of dispersion?

Which of the following is the unit digit in the product of [(341)⁴⁹¹ × (625)³¹⁷ × (6374)¹⁷⁹³]?

Which among the following is NOT a prime number?