"The precise definition of the term 'applicant' depends upon the user's recruitment and selection procedures. The concept of an applicant is that of a person who has indicated an interest in being considered for hiring, promotion, or other employment opportunities. This interest might be expressed by completing an application form, or might be expressed orally, depending on the employer's practice."
This word is usually related to official and written form. The applicant is a person who applies, as for a job, grant, support / a person who requests or seeks something such as assistance or employment or admission so the word applicant can be used correctly and properly in this question . i'm for ur view point , sir but I only refer to the teacher's Guide answer.
Best Regards and Good luck, sir