In the following question, out of the given four alternatives select the alternative which best expresses the meaning of the Idiom/Phrase.

A blind spot 

An area in your range of vision that you cannot see properly

The idiom "a blind spot" means an area in your range of vision that you cannot see properly.

The other options are incorrect.

• "A person who is blind" is not the same as a blind spot. A person who is blind cannot see at all, while a blind spot is an area in your vision that you cannot see properly.
• "A person with no emotional feelings" is not the same as a blind spot. A person with no emotional feelings is not able to feel emotions, while a blind spot is an area in your vision that you cannot see properly.
• "A situation where no progress is made" is not the same as a blind spot. A situation where no progress is made is a stalemate, while a blind spot is an area in your vision that you cannot see properly.

The idiom "a blind spot" comes from the idea of a physical blind spot, which is an area in your field of vision that you cannot see because of a defect in your eye. In the same way, a blind spot in your thinking is an area that you are not aware of or that you are not able to see clearly. For example, you might say that a politician has a blind spot when it comes to the environment if they are not aware of the impact that their policies are having on the environment.