To determine if the statement is true or false, let's calculate the sum of the odd numbers in the given group:
Odd numbers in the group: 15, 5, 13, 7, 1.
Sum of the odd numbers: 15 + 5 + 13 + 7 + 1 = 41.
Since 41 is an odd number, the sum of the odd numbers in the group is also odd. Therefore, the correct answer is:
A. True