Correct Answer - Option 1 : One nautical mile
Concept-
The Nautical Mile
Distance on water is measured in nautical miles (NM or nm). A nautical mile is 6,076.12 feet. For most calculations, 6,000 feet is close enough. By comparison, a statute mile is 5,280 feet or about 87% of a nautical mile and a kilometer is 54%.
One minute of latitude equals one nautical mile and degrees of latitude are 60 nm apart. The distance between degrees of longitude isn't constant because they converge towards the poles.
The metric system is not normally used in the nautical world except, increasingly, for use in charted depths and elevations.
1.609 kilometers = 1 mile.
The parsec is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,000 astronomical units, i. e. 30.9 trillion kilometers.
Parsec is obtained by the use of parallax and trigonometry, and is defined as the distance at which one astronomical unit subtends an angle of one arc-second.
One giga-parsec is 109 parsec.
One light-minute = 60 light-seconds = 1.798754748 × 1010 m
