Final answer:
The correct opening and closure for a job application letter should follow a standard format. The opening should include the company's name, address, and the date. The closure of the letter should be professional and polite, including a complimentary closing line, your full name, and signature.
Step-by-step explanation:
The correct opening and closure for a job application letter should follow a standard format. The opening should include the company's name, address, and the date. It should also address the recipient by their appropriate title and last name. If the recipient's name is unknown, you can use 'Dear Hiring Committee'.
The closure of the letter should be professional and polite. It should include a complimentary closing line, your full name, and your signature. Common complimentary closings include 'Sincerely', 'Regards', or 'Yours faithfully'.