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How can we identify executables and directories from the output of ls command?

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How can we identify executables and directories from the output of ls command?

(a) using -F option

(b) using  -x option

(c) using -a option

(d) using -i option

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The correct option is (a) using -F option

Best explanation: The output of the ls command simply displays filenames without indicating the file type. For identifying the file type we use -F option. The output of ls  -F displays filenames with two symbols * and /, which are type indicators. The filenames containing * are executables while those containing / are directories.

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