Instruction: Evaluate the titles of Product 1 and Product 2 to assess their similarity and whether they are likely to be purchased or viewed together. Then, select the appropriate option.

Input:
Product 1: Sigma 135-400mm f/4.5-5.6 APO DG SLD Telephoto Zoom Lens for Olympus and Panasonic Digital SLR Cameras
Product 2: Sigma 50-500mm f/4-6.3 EX DG HSM APO RF Telephoto Zoom Lens for Olympus and Panasonic SLR Cameras

Options:
A: Users who buy product 1 may also buy product 2.
B: Users who view product 1 may also view product 2.
C: The product 1 is similar with the product 2.
Answer: B