(c).

Case	PPA subtype	Nonlanguage domains				BPSD
		Memory	Attention	Executive function	Visuospatial
1	nfvPPA	Severe	Severe	Severe	Severe	Apathy, irritability
2	nfvPPA	Severe	Mild	Mild	Moderate	Anxiety, restlessness
3	nfvPPA	Mild	Normal	Mild	Normal	Fluctuating emotional control
4	nfvPPA	Severe	Severe	Severe	Severe	Disinhibition, agitation
5	nfvPPA	Severe	Severe	Severe	Severe	Depression, agitation, anxiety, apathy, disinhibition, irritability
6	Progressive dysarthria, later nfvPPA	Severe	Severe	Severe	Moderate	Depression and negativism
7	Mixed (nfvPPA+svPPA)	Mild	Normal	Moderate	Normal	Apathy, irritability, compulsivity
8	svPPA	N/A	Severe	Severe	Mild	Social disinhibition, negativism, agitation, compulsive behavior
9	lvPPA	Severe	Moderate	Severe	Moderate	Irritability, disinhibition, agitation, compulsivity, negativism