Question

is the multiplicative identity of rational numbers.

• A. 0.0
• B. -1
• C. 1
• D. 2

Answer 1

The correct option is C 1

1 is the multiplicative identity of rational numbers.
Multiplicative identity of a ratioanl number is that number, which when multiplied with the rational number, gives the same number as the product.
i.e., $\frac{p}{q}\times 1=\frac{p}{q}$
Hence, 1 is the multiplicative identity of any rational number.