The correct option is B 1,59,000
Rounding off 96,304 to the nearest thousands, we get 96,000 as
96,304 is close to 96,000 than 97,000.
Rounding off 63,179 to the nearest thousands, we get 63,000 as 63,179 is close to 63,000 than 64,000.
Therefore, the estimated sum is 96000 + 63000 = 1,59,000.