Which of the following statements is true ?
(A) 1 and -1 are reciprocal of themselves
(B) Zero has no reciprocal
(C) The product of two rational numbers is a rational number
(D) All of the above
Which of the following statements is true ?
(A) 1 and -1 are reciprocal of themselves
(B) Zero has no reciprocal
(C) The product of two rational numbers is a rational number
(D) All of the above