Answer : 3. "Mobilephone"
Explanation :

Answer: C) Mobilephone Explanation: Given 8, 9, 1, 11 letters indicates HOME which is residence 7, 2, 9, 5 indicates POOL where we can swim 1, 4, 5, 11 indicates MILE which is unit of distance 10, 9, 3, 6, 5 is NOBEL which is an International Prize 6, 11 are 'e' and 2, 9 are 'o' are same With all the above hints the word is MOBILEPHONE.