Choose the correct alternatives from given ones that will complete the series. 2,3,10,15,26,?

This series follows two interleaved patterns. Odd positions (1st, 3rd, 5th): 2, 10, 26 which follows +8, +16 (differences double: 8, 16, next would be 32). Even positions (2nd, 4th, 6th): 3, 15, ? which follows +12, +24 (differences double: 12, 24, next would be 48). So the 6th term (even position) is 15+24=39... but that's not an option. Let me reconsider. Alternative pattern: Add 1, add 7, add 5, add 11, add 9... the odd-position increments are 1, 5, 9 (increase by 4) and even-position increments are 7, 11, 15 (increase by 4). So: 2+1=3, 3+7=10, 10+5=15, 15+11=26, 26+9=35. Yes, 35 fits.