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: electric wheelchair knee rest
Product list:
A: Vive 4 Wheel Mobility Scooter - Electric Powered Wheelchair Device - Compact Heavy Duty Mobile for Travel, Adults, Elderly - Long Range Power Extended Battery with Charger and Basket Included
B: KneeRover Economy Knee Scooter Steerable Knee Walker Crutch Alternative with DUAL BRAKING SYSTEM in Matte Black
C: Intelligent Lightweight Foldable Electric Wheelchair, Compact (Net Weight 43 lbs) Power Wheelchair, Portable Folding Carry Wheelchairs, Durable Wheelchair (12.6 x 22 x 28)
D: LightEase Memory Foam Leg Support and Elevation Pillow w/Dual Handles for Surgery, Injury, or Rest
Answer: C,A,D,B