Correct Answer: Indistinct

Solution : The correct choice is the second option .

Evident is an adjective that helps describe something that is clear, obvious, and easy to understand.

Indistinct is something that is not sharp or easily defined. While "evident" is something that is clear, the other helps describe something that is not clear, making both of them antonyms for each other.

The meanings of the other options are as follows:

• Obvious is something that is easy to see and recognise.
• A stubborn person is someone who refuses to do anything else than what he is determined to do.
• An irritable person gets annoyed very easily.