# Output of this Python program?
a = [1]
b = a
b += [2]
b.append(3)
b = [4]
b.append(5)

print(a)
# --- possible answers ---
# A) [1]
# B) [1, 2]
# C) [1, 2, 3]
# D) [4]
# E) [4, 5]