Which of the following wines is NOT included in the options for Chardonnay by the glass?

The reason La Perlina is not included in the options for Chardonnay by the glass is that it is not a commonly recognized or widely offered Chardonnay in wine lists, particularly at establishments like Yard House, which tend to focus on popular and established brands. Sea Sun by Caymus, Chalk Hill, and Salmon Creek are all more prominent names in the Chardonnay category that are more frequently selected for glass pours. This selection generally aims to provide customers with well-known and appreciated varietals that appeal to a broad audience. Hence, La Perlina's absence can be attributed to its lesser known status compared to the other mentioned wines.