Instruction: Evaluate each product title in the given list, assess its relevance to the given query, and then arrange the products in descending order of relevance, with the most relevant product at the top of the ranked list.

Input:
Query: furrion backup camera for rv
Product list:
A: RV Backup Camera Wireless with 7 Touch Key DVR Monitor, HD 1080P Bluetooth Backup Camera Stable Digital Signals for Furrion Pre-Wired RV Trailer Truck, IR Night Vision Rear View Camera DoHonest S21
B: Furrion Vision S 4.3 Inch Wireless RV Backup System with 1 Rear Sharkfin Camera, Infrared Night Vision and Wide Viewing Angle - FOS43TASF
Answer: B,A