`Consider the following expressions : 1. `x+x^(2)- 1/x` 2.`sqrt(ax^(2) + bx + x - c + d/c - e / x^(2))` 3. `3x^(2) - 5 x + ab` 5 `1/x - 2/ (x+5)` Which of the above are rational expressions ?

Options

A. `1,4 and 5 only`
B. `1,3,4 and 5 only`
C. `2,4 and 5 only`
D. `1 and 2 only`

Answer

B

Explanation

A rational expression is nothing more than a fraction in which the numerator and denominator are polynomials . Here are some expample of rational expressions are
` (x+x^(2) + 1/x), (3x^(2) - 5x + ab) , 2/(x^(2) - ax + ab)`