One number in the first bracket, two in the second bracket, three in the third bracket and one in the fourth bracket The cycle is divided into (1), (3, 5), (7, 9, 11), (13), (15, 17), (19, 21, 23), (25) Then the sum of the numbers in the 50th bracket is () A. 390B. 392C. 394D. 396

One number in the first bracket, two in the second bracket, three in the third bracket and one in the fourth bracket The cycle is divided into (1), (3, 5), (7, 9, 11), (13), (15, 17), (19, 21, 23), (25) Then the sum of the numbers in the 50th bracket is () A. 390B. 392C. 394D. 396

The numbers in brackets are regular: every three groups, the numbers in them are 1 + 2 + 3 = 6, so when the 50th bracket, there are 16 groups, that is, the 48th bracket has three numbers, and the last one is 16 × 6 + 1 = 193. So the 49th bracket is (193), and the 50th bracket has two numbers, which is (195197), so the sum of the numbers in the 50th bracket is 195 + 197 = 392, so choose B