The question is about the correct use of the possessive form and the generalization with the use of the word one. It is easy to notice that the last option is not correct. Frescoes have to be in plural. In this option, the use of possessive does not apply to any kind of rule. The use of possessive in the first option is not correct because we already have used the preposition of "of" and after that it is meaningless to use possessive form. Therefore, the correct answer is B.