In India other than ensuring that public funds are used efficiently and for intended purpose what is the importance of the office of the CAG?

In India other than ensuring that public funds are used efficiently and for intended purpose what is the importance of the office of the CAG?

1.CAG exercises exchequer control on behalf of the parliament when the president of India declares national emergency/ financial emergency
2.CAG reports on the execution of projects or programmes by the ministries are discussed by the PAC/
3.Information form CAG reports can be used by investigating agencies to press charges against those who have violated the law while managing public finances.
4.While dealing with audit and accounting of govt. companies. CAG has certain judicial powers for prosecuting those who violate the law.
Which of the above are correct?

a] 1, 3 and 4 only
b] 2 only
c] 2 and 3 only
d] 1, 2, 3 and 4

Answer: C