Multiplicative in

Multiplicative inverse of a negative rational number is a negative rational number.

Example:

is a rational number so its multiplicative inverse is so that their multiplication will be 1.

⇒ Thus the multiplicative inverse is negative rational number.

(a) Incorrect because if multiplicative inverse will be positive the number obtained will have a negative sign and the result obtained will not be 1.

(c ) Incorrect because if 0 is multiplied to something the result will also be zero.

(d)Incorrect because if 1 is multiplied to a number the result obtained will not be 1.