Multiple Choice Question (MCQ)
The square root of 17,689 is exactly

×
131

×
132

✓
133

×
134

×
136
The square root of 17,689 is exactly
131
132
133
134
136
The last digit of 17,689 is 9, which must be resulted in by squaring of a number whose last digit is 3 or 7. There's only 1 option to meet the criteria.
Therefore
C is the right choice