A pump is installed at a height of 5 m above the water level in .the sump. Frictional loss on the suction side is 0.6 m. If the atmospheric pressure is 10.3 m of water and vapour pressure head is 0.4 m (abs), the NPSH (Net Positive Suction Head) will be
a. 3.7 m b. 4 m
c. 4.3 m d. 4.6 m