1,2,3,2,3,5,4,5,? | series Logical reasoning | WBCS

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Complete the series by finding the missing number from the given options. 1,2,3,2,3,5,4,5,? (a) 6 (b) 9 (c) 10 (d) 5
Correct Answer: b
1+2=3
2+3=