The four sentences (labeled $1,2,3$ and $4$) given in this question, when properly sequenced, from a coherent paragraph. Decide on the proper order for the sentence and key in this sequence of four numbers as your answer.
- The eventual diagnosis was skin cancer and after treatment all seemed well.
- The viola player didn’t know what it was; nor did her GP.
- Then a routine scan showed it had come back and spread to her lungs.
- It started with a lump on Cathy Perkins’ index finger.