Best Govt and Competitive Exam Preparation for Bank, SSC, Railways, CTET, GATE, Defence, UPSC, LAW, MBA, NET, BBA, JEE, NEET and Other States Sarkari Exams.

Which of the following is not a valid data-name in Cobol?
1) FINISH-TIME
2) F-80
3) 862B7
4) 47