He among you is the wisest who, like Socrates, knows that his wisdom is really worth nothing at all.
What does it mean? Socrates spoke with a man who was said by many to be wise, but found that this man, like countless others he had spoken to, had no more wisdom than Socrates had, [and that the man even became angry and refused to acknowledge his ignorance when Socrates showed him that this was so,] and therefore Socrates concluded that "it seems I am wiser than he is to this small extent, that I do not think I know what I do not know".
In other words, despite that all Socrates knows is that he has no wisdom, his wisdom isn't really "worth nothing at all". That is the paradox of Socratic ignorance.
The answer to your question will be 3
The correct answer is the United States
He used to live in France for a good part of his life, but when his wife died and world war 2 was beginning, he went to the United States where he held classes and remained there. He lived in the United States until his life ended at 88 years old from heart failure while he lived in New York. Although he did visit USSR during his life in the US, he never remained in USSR.