Nah.. they were given choices but this is not it. Cha Eun Woo final choices was Shin Mina while Jung Hae In was someone else I forgot who. I am a fan of PBY, but lets not give misguiding information.
Maybe at a different time or in different interviews, they may have stated that. It's possible they gave that answer after seeing a kdrama with her or the day before there may have been some k-news about her so it's the first name they thought of. Our interests do change. Just saying I can't imagine this being an outright lie, especially about Cha Eun Woo as it was stated he said that on some show.