Direction: In the paragraph below there are five sentences. In each sentence there are pairs of highlighted words (A, B). Select the most appropriate words to form correct sentences. Then from the options given select the correct option.

One Mig 21 Bison of the Indian Air Force was shot down and its pilot has been ‘missing in action’, external affairs ministry spokesperson Raveesh Kumar said on Wednesday. Kumar also told reporters that one fighter jet of Pakistan Air Force was also shot down in the A) aerial B) marine engagement by IAF's Mig 21 Bison. The Pakistani jet was seen falling down on the other side by the Indian ground forces, he said. The air-to-air engagement took place after PAF jets violated Indian air space to target military A) installations  B) fittings on the Indian side. The press briefing came soon after reports A) happened B) emerged that jets from Pakistan Air Force have A) violated B)debased  Indian air space in Jammu and Kashmir's Poonch and Nowshera sectors. The attack was successfully A) repelled B) ratified by the Indian Air Force.