UPSC CDS 1 2018 Math Paper

Decimal expression of a rational number can be terminating as well as non-terminating.

1

2

=0.5;

1

3

=0.3333.....
Decimal expansion of an irrational number is non-terminating and non-repeating.
For example,
√=1.414213562.....
Therefore, statement (d) is correct