Question: Which company works with petroleum, Apache Corporation or Alexion Pharmaceuticals?
Context: David L. Hallal is the former President and Chief Executive Officer (CEO) of Alexion Pharmaceuticals, the American pharmaceutical company best known for its development of Soliris, a drug used to treat the rare disorders atypical hemolytic uremic syndrome (aHUS) and paroxysmal nocturnal hemoglobinuria (PNH). Raymond Plank (born May 29, 1922) is the founder and retired Chairman of Apache Corporation.  He led Apache from a small oil and gas concern to a conglomerate with interests in energy, commercial real estate, agriculture, manufacturing and telecommunications, then divested its non-energy assets to concentrate exclusively on oil and gas exploration and production.  Under Plank’s leadership Apache expanded its oil and gas operations internationally and built the company from its original $250,000 capitalization to a market capitalization of over $30 billion. Alexion Pharmaceuticals Inc. is an American pharmaceutical company best known for its development of Soliris, a drug used to treat the rare disorders atypical hemolytic uremic syndrome (aHUS) and paroxysmal nocturnal hemoglobinuria (PNH).  The company is also involved in immune system research related to autoimmune diseases.  It employs around 2,400 people worldwide.  In February 2016, the company held the dedication ceremony for its new headquarters in New Haven, Connecticut, not far from the company's starting point in the same city. Hendrickson Corporation is an American privately held company located in Itasca, Illinois with revenues in excess of $1 billion that designs and manufactures commercial full-size truck suspensions.  The company works with single, tandem, and tridem drive axles as well as front and trailer suspensions.  The Bumper & Trim division manufactures exactly that, and Hendrickson Spring manufactures mechanical springs for the Hendrickson suspensions. Hunt Petroleum Corporation was an oil and gas exploration and production company formed in 1950.  The company was originally called Petrol Production Co. and was later renamed Hunt Petroleum Corporation.  The company was a Delaware corporation owned 52.84% by the Margaret Hunt Trust Estate and 47.16% by the Haroldson L. Hunt, Jr.  Trust Estate.  The primary beneficiaries of these two trusts are the two eldest children of the late H. L. Hunt and Lyda Bunker Hunt.  Hunt Petroleum Corporation had no common ownership and was not affiliated with any of the following entities: Hunt Oil Company; Petro-Hunt, LLC; Hunt Exploration; Unity Hunt; Hunt Properties; or Rosewood Resources. Ludwig Norbert Michel Hantson (born August 1962) is a Belgium businessman, the CEO of Alexion Pharmaceuticals since March 2017.  He was the president and CEO of Baxalta, an American biopharmaceutical company, from 2015 to 2016. Apache Corporation is an American petroleum and natural gas exploration and production company headquartered in Houston, Texas. Ogechukwu Olufunmilola Modie (born January 12, 1976) is a Nigerian public servant who works as the Chief of Staff (an unconstitutional office) to the Honorable Minister of State for Petroleum Resources.  She was the Chief of Staff (an unconstitutional office) to the former Group Managing Director (GMD) of Nigerian National Petroleum Corporation (NNPC), Nigeria's National Oil Corporation.  Subsequently, the GMD was named as the Chairman of the Board of the Corporation, as provided for under Section 1(2) of the Nigerian National Petroleum Corporation Act of 1997, as amended on 4th of July, 2016.  Her primary responsibility is the provision of administrative, organisational and advisory support to Dr. Emmanuel Ibe Kachikwu.  She assumed duty in August 2015. Mekong Auto Corporation headquartered in Ho Chi Minh City, Vietnam, is a car manufacturer and assembler founded in 1991.  The first car was built at the Delta Auto Plant on May 20, 1992.  Japanese Saeilo Machinery Japan Inc. is the major shareholder of the company, owning 51%.  The company opened Co Loa Auto Plant in Ha Noi City in 1993.  The company works with Fiat S.p.A. (Fiat cars and Iveco trucks), Pyeonghwa Motors and SsangYong. The Forum Corporation is a global learning and consulting company focused on leadership development and sales performance.  The company works with customers around the world and across a large variety of industries.  Founded in 1971, the company established itself as a pioneer in the corporate training and education space.  Forum has worked with over 480 companies, 130 of which are listed on the Fortune 500.
Answer: Apache Corporation