Which of the following is the multiplication fact of $20 ÷ 4 = 5$?
 

Given:

$20 ÷ 4 =5$

We have to identify its multiplication fact from the given options.

We know that every divisor fact has two multiplication facts, that are

$\mathrm{Divisor} \times \mathrm{Quotient} = \mathrm{Dividend}$

and

$\mathrm{Quotient} \times \mathrm{Divisor} = \mathrm{Dividend}$

Here, in $20 ÷ 4 = 5$

$20$ is the dividend, $4$ is divisor, and $5$ is the quotient.

Therefore, the multiplication facts of $20 ÷ 4 = 5$ will be $4 \times 5 =20 \mathrm{and} 5 \times 4 = 20$.

Hence, the correct answer is option C.