Correct Answer - Option 1 : 1
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Given
|
C
|
A
|
R
|
B
|
O
|
N
|
I
|
Z
|
E
|
After Replacement
|
B
|
B
|
Q
|
A
|
P
|
M
|
J
|
Y
|
F
|
Here, only letter B occurred twice.
Hence, only 1 letter occurred more than once.