Which of the following is a vulgar fraction?
Correct option is C. $$\cfrac{10}3$$
Vulgar fraction is a fraction is a fraction which can't be expressed in decimal form.
Meaning when representing in decimal it should not be of infinite form.
$$\cfrac{3}{10}=0.3$$ so can be represented in decimal form
$$\cfrac{13}{10}=1.3$$ So, can be represented in decimal form
$$\cfrac{10}{3}=3.3333.....$$
In this fraction decimal form is of infinity. So, it cannot be expressed in a decimal form.
$$\therefore \cfrac{10}{3}$$ is a vulger fraction
So, option $$C$$ is correct