Dear Sai,
Akhil has actually said it all....but finally we follow back on HR references....
so
Manpower Planning : is the process of identifying ,the right person on the right job ant the right at the time .
Manpower Planning is also known as Human resource Planning ,or Staffing.
Recruitment is attracting a pool of candidates to apply for the job in esteemed organisation.
Selection is a negative process where you try to find out whether the prospective candidate is actually fit for the job or not.
I hope this inf. is of help.
Regards,
Deepali.