Final answer:
The standard sub-directories within /usr directory are 'bin', containing user command binaries, and 'local', used for locally installed software. 'dev' is not part of /usr but a separate root level directory, making options 1 and 2 correct.
Step-by-step explanation:
In the context of Unix and Unix-like operating systems, the /usr directory is a standard filesystem hierarchy which contains many important sub-directories that are used by the system and its users. Among the options provided, both Option 1: bin and Option 2: local are standard sub-directories within /usr.
bin: This directory contains user command binaries (programs) that are accessible to all users. These are non-essential for booting or repairing the system.local: This is used for installing software locally to avoid overriding system binaries. It often contains additional user programs and data.
Option 3: dev is not a standard sub-directory of /usr. Rather, /dev is typically a separate directory at the root level of the filesystem which contains device nodes.
Therefore, Option 4: None of the above is incorrect since two of the options listed are indeed standard sub-directories within /usr.