“…., (q Proof: An IrOA (4 8 , 16, 4, 5) with MD = 6 obtained by using product of two OA (2 8 , 16, 2, 5)s in [49] and an IrOA (4 12 , 24, 4, 7) with MD = 8 obtained by using product of two OA (2 12 , 24, 2, 7)s in [49] can generate two new QECCs ((16,1,6)) 4 and ((24,1,8)) 4 respectively. By using product of two OA (4608,23,2,4)s obtained from the ((23,9,5)) QECC in Example 7 in [15], we can get an OA (4608 2 , 23, 4, 4) (20,256,4)) 4 respectively. In particular, an IrOA (64,6,4,3) in [48] yields an optimal QECC ((6,1,4)) 4 in [50].…”