Roll back in SQL

Hi guys,
I deleted a row in SQL, now i am trying to perform Rollback operation but it shows me this error "The ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION.". Below are the queries that i am using for this task.

For Delete i am using:
delete table 1   where [Column 0] =250
For Rollback i am using :
  Rollback tran

Thanks for helping out in Advance:) 
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