Correct Answer : A
Explanation :
Explanation :
Counting unique 2-digit prefixes gives 19 unique centres.
Correct Answered :
Wrong Answered :
A
19
B
18
C
21
D
24
Counting unique 2-digit prefixes gives 19 unique centres.
Correct Answered :
Wrong Answered :
A
33
B
68
C
84
D
94
Centre code 68 appears maximum times among the given serial numbers.
Correct Answered :
Wrong Answered :