The only SQL*Plus command in this list : DESCRIBE. It cannot be used as SQL command. This command returns a description of tablename, including all columns in that table, the datatype for each column and an indication of whether the column permits storage of NULL values. Incorrect answer: A. INSERT is not a SQL*PLUS command B. UPDATE is not a SQL*PLUS command C. SELECT is not a SQL*PLUS command E. DELETE is not a SQL*PLUS command F. RENAME is not a SQL*PLUS command Refer: Introduction to Oracle9i: SQL, Oracle University Study Guide, 7