Interview presentation - Open Topic

Dear Sir/madam

I have a second interview in 2 day’s, I have been asked to give a sales presentation on an open topic (anything, as long as i sell something, even a holiday as suggested by interviewer).

Employer is a Marketing company, the job role is for a New Business Sales/Marketing Executive, (office and field based) generating leads & client sales presentations.

Do i..
1, Produce a presentation on any topic ie. Holiday’s of which i know little about or.
2, Produce a presentation selling 'myself' to the employer as a marketing/sales tool for the employer, as my demonstration of skills & qualities used are relevant to the services i will be offering their customers.

I also haven’t been given a time limit ?

Thankyou for your help. NK