The color of methyl orange indicator in alkaline medium is:

Methyl orange is used as a pH indicator, which is a substance that gives appreciable change when the pH of the medium is changed. Methyl orange has red color below 3.3 and a yellow color above 4.1. Thus at alkaline conditions (pH>7), methyl orange has a yellow color.

Its color is yellow in an alkaline solution, but when a mineral acid is added, the color turns red. This color change is not caused by carbonic acid or any other weak acids. This indicator can therefore be used to titrate stronger mineral acids in the presence of weaker organic acids and carbonic acids. A methyl orange solution that was originally red turns yellow in the presence of a lot of water, most likely as a result of hydrolytic dissociation.

Hence, option 1 is correct.