Final answer:
Itemized payslips are most commonly issued on a monthly basis (option c), detailing an employee's earnings and deductions for that pay period.
Step-by-step explanation:
An itemized payslip must be issued to an employee on a regular basis, which can vary depending on the country's labor laws and the employer's policies. However, among the options provided, the most common practice is c) Monthly. Employers generally provide payslips each time the employees are paid, which typically occurs every month. This document details gross salary, taxes, deductions, and net salary, ensuring that both employers and employees keep accurate financial records.