In a universal testing machine during the testing of a specimen of original cross-sectional area 1 cm2 the maximum load appliied was 7.5 tonnes and neck area 0.6 sq. cm. The ultimate tensile strength of the specimen is
A.12.5 tonnes/cm2
B.10.0 tonnes/cm2
C.7.5 tonnes/cm2
D.4.5 tonnes/cm2
E.None of the above