Instruction: Analyze the query and product title to determine the relevance between the query and product, and select the appropriate option from the provided options.

Input:
Query: 20 micron water filter 10 x 2.5 culligan
Product: Express Water Whole House Heavy Metal Water Filter Set  3 Stage Water Filtration Replacement Kit  Sediment, Carbon Block, KDF High Capacity Cartridge Filters  5 Micron Water Filter 4.5 x 20 inch

Options:
A: The product is relevant to the query, and satisfies all the query specifications.
B: The product is somewhat relevant. It fails to fulfill some aspects of the query but the product can be used as a functional substitute.
C: The product does not fulfill the query, but could be used in combination with a product exactly matching the query.
D: The product is irrelevant to the query.
Answer: B: The product is somewhat relevant. It fails to fulfill some aspects of the query but the product can be used as a functional substitute.