Multiple choice technology programming languages

Which of the following is valid usage of tag/

  1. <many-to-one="product" class="Product" cloumn="PRODUCT_ID"/>

  2. <many-to-one:="product" class:="Product" cloumn:="PRODUCT_ID">

  3. <many-to-one="product" class="Product" cloumn="PRODUCT_ID">

  4. <many-to-one="product" class="PRODUCT_ID" cloumn="Product"/>
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