Final answer:
In Singapore, a training work permit is available to foreign trainees or students undergoing practical training, often white-collar workers or interns, typically between the ages of 18 and 50, sponsored by a Singaporean company.
Step-by-step explanation:
In Singapore, the eligibility criteria for a training work permit are specific and do not fit exactly any of the provided options (a-d). Instead, the permit is generally available for foreign trainees or students undergoing practical training attachments for professional, managerial, executive, or specialist jobs. These permits are typically for individuals such as white-collar workers or those on internship programs associated with educational institutions.
To apply for a training work permit in Singapore, one must satisfy several requirements, such as being sponsored by a well-established Singaporean company and having a pre-arranged contract or structured training plan. However, the age criteria is not strictly defined as being over 40 or under 18. The proper age range according to Ministry of Manpower in Singapore for a training employment pass is generally between 18 and 50.
It is important to note that the eligibility criteria for various passes and permits can change, therefore, the most accurate and current information would be obtained directly from the official Ministry of Manpower or an authorized body in Singapore.