The header that should be included first is . . . . . . . .

Solution (By Examveda Team)

This question is about the header files used in MySQL. Header files are like instruction manuals for the compiler. They tell the compiler how to understand and use the functions and variables in a program.

When writing a MySQL program, you need to include a header file to use MySQL's functions. The correct answer is Option C: mysql.h.

Here's why:

* mysql.h contains the core MySQL functions, definitions, and structures you'll need to work with databases.
* my_global.h is a global header file, but it's not the primary one for basic MySQL programming.
* my_sys.h is used internally within the MySQL system and usually not directly included by users.
* my_local.h is related to local system configurations, not general MySQL programming.

So, mysql.h is the essential header file for starting your MySQL program.