Shanika is thinking of a rational number, but tells you its opposite. What is true about the number she is thinking of?

Where are the answer choises

Rational number is a number that can be written in form a/b where b is no equal zero and a is not a symbol (like pi or e or infinity)

tells you its oposite

she chould tell you - a/b or b/a

if she told you - a/b, then if you multiplied them together, you would get a negative number

if she told you b/a, if you multiplied it by the original, you would get 1