Question

In which of the following lists are the units an order from LONGEST to SHORTEST?

• A. light-year, kilometer, astronomical unit
• B. astronomical unit, kilometer, light-year
• C. kilometer, light-year, astronomical unit
• D. light-year, astronomical unit, kilometer

Answer 1

The correct option is D light-year, astronomical unit, kilometer

$1$ Light year $=9.461\times {10}^{15}m$

$1$ Astronomical unit $=1.496\times {10}^{11}m$

$1$ kilometer $=1000m$

Socorrect answer is option (D).