mysql result is showing empty

< ^ > P N |<>| ^ _>< --- | ~ ...Help

Hi
Bellow script.,
when i run the script. it does not show any output .

#!/usr/bin/ruby
require 'cgi'
require 'mysql'
cgi = CGI.new

m = Mysql.new("localhost","root","","fosiul")
r = m.query("SELECT * FROM dc")

puts cgi.header

puts "<html><body>

        <select>
                r.each_hash do |f|
                        <option> #{f['dc']}</option>
                end
                </select>
      </body></html>"

where i am doing wrong ???
Please let me know
Thanks

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