Explanation:

- Number Range: We are looking for odd numbers between 300 and 400.

- Odd Numbers Requirement: Since the number is odd, the unit digit can be 1, 3, 5, 7, or 9.

- No Repeated Digits: Each digit in the number must be unique.

- Hundreds Digit: Must be '3' to ensure it is between 300 and 400.

- Tens and Units Digits:

- For units digit as 1, possible tens digits are 0, 2, 4, 5, 6, 7, 8, 9 (8 options).

- For units digit as 3, no other options since digits repeat.

- For units digit as 5, possible tens digits are 0, 1, 2, 4, 6, 7, 8, 9 (8 options).

- For units digit as 7, possible tens digits are 0, 1, 2, 4, 5, 6, 8, 9 (8 options).

- For units digit as 9, possible tens digits are 0, 1, 2, 4, 5, 6, 7, 8 (8 options).

- Total Odd Numbers: 8 (for units 1) + 8 (for units 5) + 8 (for units 7) + 8 (for units 9) = 32

- Correct Answer: 32

Option 1: 32