To answer this question, we need to understand the commands used to display the unique platform identifier needed to license an R/3 system.
Option A) saplicence –show - This option is incorrect because the correct command is "saplicense -get" and not "saplicence –show". Therefore, option A is incorrect.
Option B) saplicense –install - This option is incorrect because the command "saplicense -install" is used to install a license for an R/3 system, not to display the unique platform identifier. Therefore, option B is incorrect.
Option C) saplicense –obtain - This option is incorrect because the command "saplicense -obtain" does not exist. Therefore, option C is incorrect.
Option D) saplicense –get - This option is correct because the command "saplicense -get" is used to display the unique platform identifier needed to license an R/3 system. Therefore, option D is correct.
The correct answer is Option D) saplicense –get. This option is correct because it is the command used to display the unique platform identifier needed to license an R/3 system.