Find the convolution sum of sequences x1[n] = (1, 2, 3) and x2[n] = (2, 1, 4).

• A. {2, 5, 12, 11, 12}
• B. {2, 12, 5, 11, 12}
• C. {2, 11, 5, 12, 12}
• D. {-2, 5,-12, 11, 12}