Option 1 -> Starts with recruitment before estimating manpower requirements, which is illogical as you cannot recruit without knowing your needs.
Option 2 -> Also begins with recruitment before determining manpower requirements, placing estimation after recruitment which reverses the logical order.
Option 3 -> Incorrectly starts with recruitment and places manpower estimation at the end, which contradicts the proper staffing process.
Option 4 -> Follows the logical staffing sequence: first estimate requirements, then recruit & select, place & orient employees, and finally provide training & development.
Hence, Option 4: (C), (A), (D), (B) -> The correct staffing process begins with estimating manpower requirements to understand vacancies, followed by recruitment and selection to find suitable candidates, then placement and orientation to integrate them into the organization, and finally training & development to enhance their capabilities -> correct