Given the task definition and input, reply with output. 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.

What is trojan horse irc backdoor sdbot4 ksr ?
The symbol for hydronium ion consentration ?
How can you meet chirs brown ?
What is afghanistans population of 2010 ?
What is trojan horse irc backdoor sdbot4 ksr ?