Question 13 me options galat nahi hai kyunki jab mrs.John afsana pahli baar shaaye hua tha tab usme 10 rupay karz hi likha hai(reference-"Rekhta" me book *zindan ki ek raat" ) Ussi afsaane ke baad ke edition me 50 rupay kar diya gaya hai.. Since 10 rupay option me hai toh sahi jawab wahi hoga..