निम्नलिखित का आउटपुट क्या है?
What is the output of the following ?
x = 'abcd'
for i in range(len(x)) :
i.upper()
print (x) A
a b c d
B
0 1 2 3
C
error
D
none of the mentioned
Explanation
Correct Answer: D) none of the mentioned