The correct option is D 3
Concept involved:–––––––––––––––––––– On estimating a decimal number to the nearest natural number, we leave the number before a decimal point as it is, if a number after a decimal point is less than 5,
The given number is 102.__65
After estimation to the nearest natural number, 102.__65 becomes 102.
So, the digit after a decimal point should be less than 5.
All the options given are correct answers because all are less than 5.