Answer: Option III 

Easy Explanation by SamagraCS Team:

Definition: Basic COCOMO can be used for quick and slightly rough calculations of Software Costs.

Basic COCOMO model takes the form

E = ab(KLOC)bb
D = cb(E)db

Note: where E is effort applied in Person-Months, and D is the
development time in months. The coefficients ab, bb, cb and db are
given in table 



 E = 2.4(KLOC)1.05 Per Month

So, Option(III)is correct.