Select the set in which the numbers are related in the same way as are the numbers of the following sets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E. g. 13 – Operations on 13 such as adding / subtracting / multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

Q:

(7, 3, 43)
 (5, 2, 21)

• 1
  (11,5,111)
• 2
  (15,6,34)
• 3
  (13,23,131)
• 4
  (12,3,43)