Instruction: Given the title of two products, predict if the two products are similar, if the two products will be purchased or viewed together. Answer only from the options.

Input:
Product 1: K&amp;F Concept Lens Mount Adapter for Nikon AI Lens to Sony NEX E-Mount Camera, fits Sony NEX-3 NEX-3C NEX-3N NEX-5 NEX-5C NEX-5N NEX-5R NEX-5T NEX-6 NEX-7 NEX-F3 NEX-VG10 VG20
Product 2: Vizelex ND Throttle Lens Mount Adapter - Nikon Nikkor F Mount G-Type D/SLR Lens to Sony Alpha E-Mount Mirrorless Camera Body with Built-In Variable ND Filter (1 to 8 Stops)

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