Question: Who succeeded 27th Chief of Army Staff Bipin Rawat in the Indian Army to be responsible for operation and army related tasks?

full_context: Document 1: Chief of the Air Staff (India): Chief of the Air Staff is the commander and the highest-ranking officer of the Indian Air Force. The position is abbreviated as CAS in the Indian Air Force cables & communication, and is usually held by a four-star officer of the rank Air Chief Marshal. The current CAS is Air Chief Marshal Birender Singh Dhanoa who took office on 31 December 2016, following the retirement of Air Chief Marshal Arup Raha.
Document 2: Harbaksh Singh: Lieutenant General Harbaksh Singh, Padma Vibhushan, Padma Bhushan, VrC was a Three Star General in the Indian Army. As the Western Army Commander, Lt Gen Harbaksh Singh commanded the Indian Army forces and played a key role during the Indo-Pakistani War of 1965. He was awarded the Padma Vibhushan, Padma Bhushan and Vir Chakra.
Document 3: Vice Chief of the National Guard Bureau: The Vice Chief of the National Guard Bureau (VCNGB) is the second highest-ranking officer of the National Guard Bureau, which is a joint activity of the United States Department of Defense. The Vice Chief of the National Guard Bureau is the second in charge of the National Guard of the United States; which is a joint reserve component of the United States Army and the United States Air Force. The VCNGB serves as the principal advisor to the Chief of the National Guard Bureau and the Secretary of Defense, through the Chairman of the Joint Chiefs of Staff, on matters involving non-federalized National Guard forces and on other matters as determined by the United States Secretary of Defense. The VCNGB also serves as the principal adviser to the Secretary of the Army, Secretary of the Air Force, the Chief of Staff of the Army, and the Chief of Staff of the Air Force, on matters relating to federalized forces of the National Guard of the United States and its subcomponents; the Army National Guard of the United States, and the Air National Guard of the United States.
Document 4: Indian Army: The Indian Army is the land-based branch and the largest component of the Indian Armed Forces. The President of India is the Supreme Commander of the Indian Army, and it is commanded by the Chief of Army Staff (COAS), who is a four-star general. Two officers have been conferred with the rank of field marshal, a five-star rank, which is a ceremonial position of great honour. The Indian Army originated from the armies of the East India Company, which eventually became the British Indian Army, and the armies of the princely states, which finally became the national army after independence. The units and regiments of the Indian Army have diverse histories and have participated in a number of battles and campaigns across the world, earning a large number of battle and theatre honours before and after Independence.
Document 5: Bipin Rawat: General Bipin Rawat, UYSM, AVSM, YSM, SM, VSM, is the 27th Chief of Army Staff of the Indian Army. He assumed office on 31 December 2016 after retirement of General Dalbir Singh.
Document 6: Gopal Gurunath Bewoor: General Gopal Gurunath Bewoor, Padma Bhushan, PVSM (11 August 1916 – 24 October 1989) was an officer of the Indian Army who served as the 9th Chief of Army Staff. In a long service spanning four decades, Gen. Bewoor saw action during World War II and later was involved in Indian Army operations during the 1965 as well as 1971 Indo-Pakistani war. He succeeded Field Marshal Sam Manekshaw as the Army chief in January 1973 and following his retirement from the army, served as the Indian Ambassador to Denmark till 1979. He was a recipient of the third highest Indian civilian honour of the Padma Bhushan.
Document 7: Om Prakash Malhotra: General Om Prakash "OP" Malhotra, PVSM (6 August 1922 – 29 December 2015) was an Indian Army General. He was the 13th Chief of Army Staff of the Indian Army from 19781981. He also served as the Ambassador of India to Indonesia from 19811984, and Governor of Punjab and Administrator of Chandigarh from 19901991.
Document 8: Air Force ranks and insignia of India: The Indian Air Force's rank structure is based on that of the Royal Air Force. The highest rank attainable in the Indian Air Force is Marshal of the Indian Air Force, conferred by the President of India after exceptional service during wartime. MIAF Arjan Singh is the only officer to have achieved this rank. The head of the Indian Air Force is the Chief of the Air Staff, who holds the rank of Air Chief Marshal. The current Chief of the Air Staff is Air Chief Marshal Birender Singh Dhanoa, appointed on 31 December 2016, following the retirement of Air Chief Marshal Arup Raha.
Document 9: Dalbir Singh: General Dalbir Singh Suhag, (born 28 December 1954) was the 26th Chief of the Army Staff (COAS) of the Indian Army, who assumed office on 31 July 2014, following the retirement of General Bikram Singh. He served as the Vice Chief of the Army Staff (VCOAS) before taking charge as Chief of the Army Staff. He retired on 31 December 2016.
Document 10: Vice Chief of the Army Staff (India): The Vice Chief of the Army Staff is second in command of the Indian Army next to Chief of the Army Staff. He is responsible for operation and army related tasks. As of January 2017, the post was held by Sarath Chand succeeding Bipin Rawat.
Document 11: Paramasiva Prabhakar Kumaramangalam: General Paramasiva Prabhakar Kumaramangalam, DSO, MBE (1 July 1913 – 13 March 2000) was the 7th Chief of the Army Staff (COAS) of the Indian Army from 1967 to 1970. He was among the last of the King's Commissioned Indian Officers trained in England in the Indian Army, and the last KCIO Indian Army Chief.
Document 12: United States Under Secretary of the Army: The United States Under Secretary of the Army is the second-highest ranking civilian official of the United States Department of the Army, serving directly under the United States Secretary of the Army. The Secretary and Under Secretary, together with two military officers, the Chief of Staff of the United States Army and the Vice Chief of Staff of the United States Army, constitute the senior leaders of the United States Army.
Document 13: Ashfaq Parvez Kayani: Ashfaq Parvez Kayani, (Urdu: ‎ , born 20 April 1952; NI(M), HI), is a retired four-star rank army general in the Pakistan Army who served as the Chief of Army Staff from 29 November 2007 to 29 November 2013. He succeeded General Pervez Musharraf as the chief of army staff on 29 November 2007. He also held the acting charge of Chairman of the Joint Chiefs of Staff Committee from October to November 2013. In addition, General Kayani served as the Director-General of the Inter-Services Intelligence ("ISI") and as director of the Directorate-General of Military Operations (DGMO). On 24 July 2010, Prime Minister Yousaf Raza Gillani extended Kayani's term as Chief of the Army Staff by three years, making him the first four-star officer to receive a term extension from any democratic government.
Document 14: Bipin Chandra Joshi: General Bipin Chandra Joshi, PVSM, AVSM, ADC (5 December 1935 – 19 November 1994) was the 17th Chief of Army Staff (COAS) of the Indian Army. He was born in Pithoragarh, Uttarakhand.
Document 15: Tapishwar Narain Raina: General Tapishwar Narain Raina Padma Bhushan, MVC (1921 – 19 May 1980) was a former Chief of the Army Staff of the Indian Army. He held the office between 1975 and 1978. Later, he served as High Commissioner to Canada. He was a recipient of the third highest civilian honour of India, the Padma Bhushan.
ground_truth: Sarath Chand