H + 2 = J, J + 3 = M, M + 5 = R, R + 7 = Y, Y + 11 = J A, I, O, U are vowels given. Thus, G in the bracket are wrongly placed, the correct will be, 11 will be added because differences are in the prime number. The next prime number will be "11". Y + 11 = J. Hence, the correct answer is "The first bracketed letter is correct and the second bracketed letter is incorrect."