You are given a list of queries separated by new line. Your job is to answer with the query that is the most well-formed or well-structured query in terms of grammar, punctuations, or spelling errors.

Activities of collective bargaining ?
What the name of the singer in the black eyed peas ?
How much is disposable contact lens ?
How do you get rid of back acne and scars ?
How do you get rid of back acne and scars ?