In what year was the album “Snow Pink” released by Apink?

In what year was the album “Snow Pink” released by Apink?: The album “Snow Pink” was released in 2011 by Apink, featuring 5 tracks.
What is the most successful song from the album “Snow Pink” by Apink?: “He's My Baby” is the biggest hit from the album “Snow Pink” by Apink.

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