Which of the following call signs is a valid Canadian amateur radio call sign?

In Canada, amateur radio call signs are issued with specific prefixes allocated by the International Telecommunication Union (ITU). The standard Canadian prefixes are VE, VA, VO, and VY. Therefore, VA3RAC is a valid Canadian call sign. The other options belong to different countries based on their prefixes. 'BY' is allocated to China, 'K' (as seen in KA9OLS) belongs to the United States, and 'SM' is designated for Sweden.