Explanation:

Correct Answer is (c).There are certain words which are always used in singular number and no plural form is there for such words. Information is an example of such word that is used only in singular number. Hence, informations is wrong usage in the given sentence. It is also always followed by singular verb and not plural verb.
The correct sentence would be: The information provided by my secret sources turned out to be true.This makes option C the correct choice among the given options.