The correct option is B Malingerer
The term "malingering" applies to persons who deliberately pretend to have an illness or disability in order to receive financial or other gain, or to avoid punishment or responsibility, that is, pretending illness to escape duty. One who malingers is called a malingerer. Hence, Option B is correct. Among the rest of the options, truant means a pupil who stays away from school without leave or explanation, hypocrite means a person who pretends to have certain beliefs, attitudes or feelings when they really do not, concubine means a woman who lives with a man but has lower status than his wife or wives. They do not express the intended meaning, hence incorrect.