Question

1. Choose the best answer:
1. Which one of the following statement is correct about the astronomical unit?
a. It is the mean distance between the centre of the sun to the centre of the Earth
b. It is the mean distance between centre of the Earth to the centre of the Moon
c. It is the mean distance between centre to the Earth to the centre of the Mars
d. It is the mean distance between the centre of the Earth to the centre of the Jupiter​

Answer 1

Answer:

(a) it is the mean distance between the center of the sun to the center of the earth