Passage: The prince then allied himself with the Khmer Rouge, the North Vietnamese, the Laotian Pathet Lao and the Viet Cong, throwing his personal prestige behind the communists. On 5 May, the actual establishment of FUNK and of the Gouvernement royal d'union nationale du Kampuchéa or GRUNK (Royal Government of National Union of Kampuchea), was proclaimed. Sihanouk assumed the post of head of state, appointing Penn Nouth, one of his most loyal supporters, as prime minister.Khieu Samphan was designated deputy prime minister, minister of defense, and commander in chief of the GRUNK armed forces (though actual military operations were directed by Pol Pot). Hu Nim became minister of information, and Hou Yuon assumed multiple responsibilities as minister of the interior, communal reforms, and cooperatives. GRUNK claimed that it was not a government-in-exile since Khieu Samphan and the insurgents remained inside Cambodia. Sihanouk and his loyalists remained in China, although the prince did make a visit to the "liberated areas" of Cambodia, including Angkor Wat, in March 1973. These visits were used mainly for propaganda purposes and had no real influence on political affairs.For Sihanouk, this proved to be a marriage of convenience that was spurred on by his thirst for revenge against those who had betrayed him. For the Khmer Rouge, it was a means to greatly expand the appeal of their movement. Peasants, motivated by loyalty to the monarchy, gradually rallied to the GRUNK cause. The personal appeal of Sihanouk and widespread US aerial bombardment helped recruitment. This task was made even easier for the communists after 9 October 1970, when Lon Nol abolished the loosely federalist monarchy and proclaimed the establishment of a centralized Khmer Republic.The GRUNK was soon caught between the competing Communist powers: North Vietnam, China and the Soviet Union. During the visits that Chinese Premier Zhou Enlai and Sihanouk paid to North Korea in April and June 1970, respectively, they called for the establishment of a...

Question: Whose job was to be the minister of the interior?
Hou Yuon