To answer this question, you need to understand the concept of the Program Global Area (PGA) and its components.
The PGA is a memory area that is allocated for each session in a database. It is used to store session-specific information and data structures. One of the components of the PGA is the stack space.
The stack space in a PGA holds session variables and arrays. These variables and arrays are used by the session during its execution. The stack space is used for storing local variables, procedure and function call frames, and other temporary data structures specific to the session.
Now let's go through each option to understand why it is correct or incorrect:
Option A) stack variables and other info - This option is incorrect because the stack space in a PGA does hold stack variables, but it does not hold "other info" such as session-specific information.
Option B) session's variables and arrays - This option is correct because the stack space in a PGA holds session variables and arrays. These variables and arrays are used by the session during its execution.
Option C) session info stored in PGA - This option is incorrect because session info is stored in the PGA, but it is not specifically stored in the stack space.
Option D) binding variables and runtime buffers - This option is incorrect because binding variables and runtime buffers are not stored in the stack space of the PGA.
Therefore, the correct answer is Option B) session's variables and arrays. This option is correct because the stack space in a PGA holds session variables and arrays that are used by the session during its execution.