Instruction: Evaluate the relevance between the query and product title, and choose the most accurate option from the given options.

Input:
Query: smartphone doorknob
Product: AKASO Smart Lock, Smart Electronic Door Lock APP Code Touch Screen Keypad Deadbolt Entrance Smart Electronic Digital Door Lock with Key Remote Keypad for Home Hotels Apartment (Black)

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.