‘R’ will be the first part of the given sequence as it tells the effect of the disease called ‘pink eye’ (mentioned in S1) , that is, eyeballs turn quite red and have a feeling of irritation. ‘Q’ will come next as it states the other effect of the disease, that is, a white discharge in the corners of the eyes. ‘S’ will come next as ‘this discharge’ refers to the ‘white discharge’ in Q. ‘P’ will pair with S6 as both the sentences are making reference to the school children , that is , students. Hence,RQSP is the correct sequence. Thus, option (c) is correct .