In a sequence with the first term is positive integer, the next term is generated by adding the previous term and its largest digit. At most how many consequtive terms of this sequence are odd?

$ 
\textbf{(A)}\ 2
\qquad\textbf{(B)}\ 3
\qquad\textbf{(C)}\ 4
\qquad\textbf{(D)}\ 5
\qquad\textbf{(E)}\ 6
$
1. Let \( a_1 \) be the first term of the sequence, which is a positive integer.
2. The next term \( a_{n+1} \) is generated by adding the previous term \( a_n \) and its largest digit. We need to determine the maximum number of consecutive odd terms in this sequence.
3. Consider the last digit of \( a_n \). If \( a_n \) is odd, its last digit must be one of \( 1, 3, 5, 7, 9 \).
4. The largest digit of \( a_n \) can be any digit from \( 0 \) to \( 9 \). However, since \( a_n \) is odd, the largest digit must be even to ensure that the sum \( a_n + \text{largest digit} \) remains odd.
5. We will analyze the sequence by considering the last digit of \( a_n \) and the effect of adding the largest digit.

Let's consider the possible scenarios for the last digit of \( a_n \):

- If the last digit of \( a_n \) is 1:
  \[
  a_{n+1} = a_n + 1 \quad (\text{largest digit is 1})
  \]
  The last digit of \( a_{n+1} \) is 2 (even).

- If the last digit of \( a_n \) is 3:
  \[
  a_{n+1} = a_n + 3 \quad (\text{largest digit is 3})
  \]
  The last digit of \( a_{n+1} \) is 6 (even).

- If the last digit of \( a_n \) is 5:
  \[
  a_{n+1} = a_n + 5 \quad (\text{largest digit is 5})
  \]
  The last digit of \( a_{n+1} \) is 0 (even).

- If the last digit of \( a_n \) is 7:
  \[
  a_{n+1} = a_n + 7 \quad (\text{largest digit is 7})
  \]
  The last digit of \( a_{n+1} \) is 4 (even).

- If the last digit of \( a_n \) is 9:
  \[
  a_{n+1} = a_n + 9 \quad (\text{largest digit is 9})
  \]
  The last digit of \( a_{n+1} \) is 8 (even).

From the above analysis, we see that if \( a_n \) is odd, \( a_{n+1} \) will always be even. Therefore, the sequence can have at most one odd term followed by an even term.

However, if we consider the possibility of the largest digit being even, we can extend the sequence of odd terms. For example, if the largest digit is 8, we can have the following sequence:

- \( a_1 = 8007 \) (odd)
- \( a_2 = 8007 + 8 = 8015 \) (odd)
- \( a_3 = 8015 + 8 = 8023 \) (odd)
- \( a_4 = 8023 + 8 = 8031 \) (odd)
- \( a_5 = 8031 + 8 = 8039 \) (odd)

In this case, we have 5 consecutive odd terms. Therefore, the maximum number of consecutive odd terms in the sequence is 5.

The final answer is \(\boxed{5}\).