The largest and the shortest distance of the earth from the sun  are

The largest and the shortest distance of the earth from the sun  are r₁ and r₂ , its distance from the sun when it is at the perpendicular to the major axis of the orbit drawn from the sun

(a)     r₁ + r₂ /4                                      (b)  r₁ r₂/ r₁ + r₂

(c)  2 r₁ r₂/ r₁ + r₂                                (d) r₁ + r₂ /3

Answer: c