Assertion (A) : $\dfrac{1}{2} + 2 = \dfrac{5}{2}$, which is a rational number.

Reason (R) : If $\dfrac{p}{q} \text{ and } \dfrac{r}{s}$ are any two rational numbers then $\dfrac{p}{q} + \dfrac{r}{s} = \dfrac{r}{s} + \dfrac{p}{q}$.

1. Both A and R are correct, and R is the correct explanation for A.

2. Both A and R are correct, and R is not the correct explanation for A.

3. A is true, but R is false.

4. A is false, but R is true.

Assertion (A) : 0 and $\dfrac{11}{12}$ are two rational numbers and $\dfrac{11}{12} \ne 0$ then 0 ÷ $\dfrac{11}{12} = 0$, a rational number.

Reason (R) : If a rational number is divided by some non - zero rational number, the result is always a rational number.

1. Both A and R are correct, and R is the correct explanation for A.

2. Both A and R are correct, and R is not the correct explanation for A.

3. A is true, but R is false.

4. A is false, but R is true.

Write the rational numbers that are equal to their reciprocal.

Write the reciprocal of $-\dfrac{8}{17} + \dfrac{-8}{17}$.