Instruction: Evaluate the relevance of each product title in the input to the given query, and then sort the products in descending order of relevance, placing the most relevant product at the top of the ranked list.

Input:
Query: fountain pen without cartridge
Product list:
A: C2 Fountain Pen Fine Nib, Eyedropper Filling, Clear Transparent Acrylic, Large-Capacity Gift Set (Clear Color Only)
B: Amazon Basics Refillable Fountain Pen - Fine Point, Black Ink
C: ZenZoi Yellow Fountain Pen Set W/Premium Schmidt Fine Nib. Include High-End Pen, 1 Ink Converter, 2 Ink Refills & Gift Case. Effortless Writing Calligraphy Pen Set for Men or Women (Fine Nib, Yellow)
Answer: B,C,A