Correct Answer - Option 2 : 3 and 4
Given:
Checking 1:
Zero is not a natural number, hence it is false
Checking 2:
398 is predecessor of 399, hence it is false
Checking 3:
Whole number starts from zero, hence zero is the smallest number and it is true
Checking 4:
600 is the next number of 599, hence 600 is the successor of 599 and it is true
∴ Only 3 and 4 are true