Select the odd group of numbers. (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)

14 - 208

The logic followed here is :

14 - 208 = 14² + 12 = 208 (odd)

18 - 334 = 18² + 10 = 334

12 - 154 = 12² + 10 = 154

16 - 266 = 16² + 10 = 266