Technician A says that you can check a leaking head gasket using a chemical tester. Technician B says that you can find a leaking head gasket using an exhaust analyzer. Who is correct?

A. Technician A
B. Neither Technician A nor B
C. Technician B
D. Both Technicians A and B
NEED ANSWER FAST PLZ
Answer is NOT C. Technician B