The correct choice is (c) three
The best explanation: There are three fuel flow laws. They are:
i. C=C1, here specific fuel consumption is constant
ii. C=C2θ^1/2M^n , here it considers temperature and effects of mach number
iii. C=C3+C4M and C=C5+C6FN, here the assumptions are taken for empirical fuel flow data.