The smallest positive integer in the rational number is _ The largest negative integer is _ The smallest positive integer in the rational number is _ and the largest negative integer is _

The smallest positive integer in the rational number is _ The largest negative integer is _ The smallest positive integer in the rational number is _ and the largest negative integer is _

The smallest positive integer in the rational number is 1 The largest negative integer is -1

In the following statement,() A positive integers and negative integers are collectively called rational numbers B Positive,0 and negative numbers are collectively referred to as rational numbers The number of C-squared and the irrational number of π system D Rational number and irrational number are collectively referred to as real number

Select D