"A notice is placed on the notice board of the firm specifying the details of the jobs available". This source of recruitment is:

Direct recruitment

The correct answer is option 3- Direct recruitment.

Direct recruitment is highlighted in the given lines.

Direct Recruitment: Under the direct recruitment, a notice is placed on the notice-board of the enterprise specifying the details of the jobs available. Jobseekers assemble outside the premises of the organisation on the specified date and selection is done on the spot.

OTHER OPTIONS

• Casual Callers: Many reputed business organisations keep a database of unsolicited applicants in their offices. Such job-seekers can be a valuable source of man power. A list of such job-seekers can be prepared and can be screened to fill the vacancies as they arise.

• Advertisement: Advertisement in newspapers or trade and professional journals is generally used when a wider choice is required. Most of the senior positions of industry as well as commerce are filled by this method.

• Labour Contractors: Labour contractors maintain close contacts with labourers and they can provide the required number of unskilled workers at short notice. Workers are recruited through labour contractors who are themselves employees of the organisation.