运行结果:1 1 1 1 12 2 2 2 23 3 3 3 34 4 4 4 45 5 5 5 5请根据运行结果将代码空白处填上合适的选项？（ ）
num1 = 1
while num1 <= 5:
num2 = 1
while num2 <= 5:
____________
num2 += 1
print()
num1 += 1print(num2,end="")
print(num2,end =" ")
print(num1)
print(num1,end =" ")