Siddartha kumar dasasks : Two discrete time systems with impulse responses h1[n] = [n -1] and h2[n] = [n – 2] are connected in cascade. The overall impulse response of the cascaded system is (A) [n - 1] + [n - 2] (B) [n - 4] (C) [n - 3] (D) [n - 1] [n - 2]