The word harbour refers to the coastal area of sea partly enclosed by a thick wall (in order to PROTECT the area from waves) where BOATS and ships can be sheltered for safety. In its verb form, the word harbour means to keep an emotion, secret or thought in one’s mind for a long period of time. So this word is used correctly in statement A.

Statements B and C do not MAKE logical sense because of the incorrect usage of the word harbour. The possible substitutes for this word are as follows:

Statement B : To prevent the colossal loss of lives in road accidents, we are giving priority torectifying / amending / repairing$ accident-prone black spots through ENGINEERING means, employing road safety features at the design stage for highways, conducting road safety audits, setting up driver training and post-trauma care centres as well as generating awareness.

Statement C: Another responsibility assigned$ to me, and which I hold very dear to my heart, is managing the water resources of the country and cleaning the Ganga to restore her glory. 

THEREFORE, the correct answer is option 3$.