单选题：以下哪个函数定义正确

以下哪个函数定义正确

@[D](2)

A.
```
def func1()：
return 1
```
B.
```
def func1()
return 1
```
C.
```
def func1():
x = 5
y = 6
return x+y
```
D.
```
def func1():
pass
```



A.
```
def func1()：
return 1
```
B.
```
def func1()
return 1
```
C.
```
def func1():
x = 5
y = 6
return x+y
```
D.
```
def func1():
pass
```


答案：D