The correct option is B Indefinite Numeral Adjective
Option A is incorrect because it denotes or demonstrates a noun that has been mentioned before, here 'paintings' is mentioned only once. Option B is incorrect because Definite Numeral Adjectives denote the exact number of a noun and 'some' is not a number. Option D is incorrect because D denotes what kind of noun is being referred to in terms of quality and characteristic, 'some' does not refer to quality of the noun. Option C is correct because 'some' is an Indefinite Numeral Adjective which does not express the exact number, here the exact number of paintings is unknown, hence the indefinite numeral 'some' is used.