Question: What intelligence agency was the subject of the drama film Sarbjit a spy for?

Context paragraphs:
Operation PBHISTORY: Operation PBHistory was a covert operation in Guatemala by the United States Central Intelligence Agency (CIA).  It followed Operation PBSuccess, which led to the overthrow of Guatemalan President Jacobo Árbenz in June 1954 and ended the Guatemalan Revolution.  PBHISTORY attempted to use documents left behind by Árbenz's government and by organizations related to the Guatemalan Party of Labour to demonstrate that the Guatemalan government had been under the influence of the Soviet Union, and to use those documents to obtain further intelligence that would be useful to US intelligence agencies.  It was an effort to justify the overthrow of the elected Guatemalan government in response to the negative international reactions to PBSUCCESS.  The CIA also hoped to improve its intelligence resources about communist parties in Latin America, a subject on which it had little information.

Sarabjit Singh: Sarabjit Singh (also spelled Sarabjeet Singh; 1963 or 1964 – 2 May 2013) (alleged to be Manjit Singh by Pakistan) was an Indian national convicted of terrorism and spying by a Pakistani court.  He was tried and convicted by the Supreme Court of Pakistan for a series of bomb attacks in Lahore and Faisalabad that killed 14 bystanders in 1990.  On the contrary, Sarabjit claimed he was a farmer who strayed into Pakistan from his village located on the border, three months after the bombings.  According to an unnamed Indian Intelligence official, Singh had been a spy for the Indian Research and Analysis Wing intelligence agency and had been working undercover in Pakistan.

Valerie Plame: Valerie Elise Plame Wilson (née Plame; born August 13, 1963), known as Valerie Plame, Valerie E. Wilson, and Valerie Plame Wilson, is an American writer, spy novelist and former operations officer working at the United States Central Intelligence Agency (CIA).  As the subject of the 2003 Plame affair, also known as the "CIA leak scandal", Plame had her identity as covert officer of the CIA leaked to the press by members of the George W. Bush administration and subsequently made public.  In collaboration with a ghostwriter, Plame wrote a memoir detailing her career and the events leading up to her resignation from the CIA, and subsequently wrote and published two spy novels.  After a number of years out of the limelight, she later made the news for leading a campaign to raise enough money to buy a controlling interest of Twitter stock, in order to remove Donald Trump from the platform, as well as controversy surrounding antisemitic activity on social media, for which she subsequently apologized.

Omung Kumar: Omung Kumar is an Indian film director, and production designer, known for his works in Hindi cinema.  He made his directorial debut with the 2014 biographical sports drama "Mary Kom" starring Priyanka Chopra.  The film was a critical and commercial success.  He and the film received several awards and nominations, including the National Film Award for Best Popular Film Providing Wholesome Entertainment.  He came up with his second film Sarbjit which was a biopic based on the life of "Sarabjit Singh".  The film was commercially and critically success at the box office.  He is now coming up with another film 'Bhoomi', which will be Sanjay Dutt's comeback film which is a critical and commercial failure.

S. Eugene Poteat: S. Eugene Poteat (born 1930) is a retired senior Central Intelligence Agency executive.  He was awarded the CIA's Intelligence Medal of Merit and the National Reconnaissance Office Meritorious Civilian Award.  He was President of AFIO - the Association of Former Intelligence Officers for fifteen years, retiring in 2014, and appointed AFIO's President-emeritus in 2015.  He previously served on the Board of Advisors of the International Spy Museum.  He is currently Professor Emeritus at the Institute of World Politics in Washington, D.C., teaching a course on "Technology, Intelligence, Security, and Statecraft".

Control (fictional character): Control is a fictional character created by John le Carré.  Control is an intelligence officer who acts as the head of "the Circus", the British overseas intelligence agency.  He is a character in the novels "The Spy Who Came in from the Cold", "The Looking Glass War", and "Tinker Tailor Soldier Spy", and is referred to in several others, usually by association with le Carré's recurring protagonist George Smiley, who has served as Control's right-hand man.

Sarbjit (film): Sarbjit is a 2016 Indian biographical drama film directed by Omung Kumar.  The film features Aishwarya Rai as Dalbir Kaur and Randeep Hooda portrays the title role Sarabjit Singh, an Indian man who was sentenced to death by the Supreme Court of Pakistan in 1991 and who consequently spent 22 years in prison for alleged terrorism and spying while Richa Chadda and Darshan Kumar play supporting roles.

Otto von Bolschwing: Otto Albrecht Alfred von Bolschwing (15 October 1909 in Schönbruch, District of Bartenstein, East Prussia (now Poland) – 7 March 1982 in Sacramento, California, USA) was a German SS-"Hauptsturmführer" in the Nazi "Sicherheitsdienst" (SD), Hitler's SS intelligence agency.  After World War II von Bolschwing became a spy and worked for the Central Intelligence Agency (CIA) in Europe and later in California.

The Impossible Spy: The Impossible Spy is a film based on the true story of an Israeli civilian spy named Eli Cohen who was recruited into Israel's Secret Intelligence Agency (the Mossad) in the 1960s to become a spy in Damascus.  Prior to his capture in 1965, Cohen was about to be appointed the third most powerful figure in Syria—the Deputy Minister of Defense.  Cohen's memorization of Syria's individual gun placements along the Golan Heights enabled Israel to defeat Syria in the Six-Day War in 1967.

George Smiley: George Smiley OBE is a fictional character created by John le Carré.  Smiley is a career intelligence officer with "The Circus", the British overseas intelligence agency.  He is a central character in the novels "Call for the Dead", "A Murder of Quality", "Tinker Tailor Soldier Spy", "The Honourable Schoolboy", and "Smiley's People", and a supporting character in "The Spy Who Came in from the Cold", "The Looking Glass War", "The Secret Pilgrim" and "A Legacy of Spies".

Supporting paragraphs: Sarbjit (film) Sarabjit Singh
Answer: Indian Research and Analysis Wing