Answer:
Jean complains of a headache.
Step-by-step explanation:
Eugene Ionesco's avant garde play "Rhinoceros" was one of the prominent plays of the genre 'absurd'/ the theater of the absurd. This play is also considered to be an indirect reference to the rise of fascism and nazism, dealing with popular themes such as conformity towards the popular opinion, morality, mob mentality etc.
The play consists of Three Acts. Act II shows the scene of Berenger going to office but strange things began to happen where there seem t be a rise in the rhinoceros population among normal people. His friend, the main protagonist, Jean had not come for work, leading Berenger to visit his friend. Once there, he found that Jean was sick and that he had also began to have a strange coloration in him too. Jean also complains of a headache, that is too much for him to handle. Thus, the right answer for the sentence is that
Jean becomes ill and complains of a headache.