Instruction: Predict whether two products are similar, whether two products are likely to be purchased or viewed together based on their titles. Choose your answer from the provided options.

Input:
Product 1: SIIG RS-232 To Bluetooth Converter
Product 2: Siig - Network Adapter - Serial RS-232 - Black (ID-SB0111-S1)

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