Q:Information: - The Jaguar XF ( codename : X250 ) is an executive / mid-size luxury car and estate produced by British car manufacturer Jaguar Cars . It was first unveiled in autumn 2007 as a replacement for the Jaguar S - Type . - Birmingham is a major city and metropolitan borough of West Midlands, England. It is the largest and most populous British city outside London, with a population in 2014 of 1,101,360. The city is in the West Midlands Built-up Area, the third most populous urban area in the United Kingdom, with a population of 2,440,986 at the 2011 census. Birmingham's metropolitan area is the second most populous in the UK with a population of 3.8 million. This also makes Birmingham the 9th most populous metropolitan area in Europe. - The Jaguar S-Type is a model of executive car that debuted at the 1998 Birmingham Motor Show and was marketed by Jaguar for model years 1999-2008, reviving the nameplate of the company's 1963-66 S-Type. The S-Type received a mild facelift for model year 2005. - Executive car is a British term for an automobile larger than a large family car. In official use, the term is adopted by Euro NCAP, a European organization founded to test car safety. After reading the paragraphs above, we are interested in knowing the entity with which 'jaguar xf' exhibits the relationship of 'series'. Find the answer from the choices below. Choices: - 2 - executive car - family car - populous
A:
executive car