The largest and the shortest distance of the earth from are r1 and r2. It’s distance from the sun when it is perpendicular to the major-axis of the orbit drawn from the sun.
$\left(\dfrac{r_{1}+r_{2}}{4}\right)$
$\left(\dfrac{r_{1}+r_{2}}{r_{1}-r_{2}}\right)$
$\left(\dfrac{2r_{1}r_{2}}{r_{1}+r_{2}}\right)$
$\left(\dfrac{r_{1}+r_{2}}{3}\right)$