I am not sure ______ the exact date, but I think he arrived here in 1995.
A. of
B. about

Note: I know that “of” is more specific and "about" is more general. But somehow I feel “about” sounds more natural in this sentence.　What do you think?

Question

I am not sure ______ the exact date, but I think he arrived here in 1995.
A.	of 
B.	about

Note: I know that “of” is more specific and "about" is more general. But somehow I feel “about” sounds more natural in this sentence.　What do you think?

Answer

I would use the word "of" not "about". Both can be used