$\Delta BCA\sim\Delta MNL$

$\Delta ABC\sim\Delta MLN$

$\Delta CAB\sim\Delta NLM$

None of these

Yes

No

Cannot be determined

 $\angle ADB\cong\angle AEC$  

 $\angle ABD\cong\angle ADB$  

 $\angle DAB\cong\angle DEC$  

 $\angle ACE\cong\angle AEC$  

$\Delta XWZ\sim\Delta XYZ$

$\Delta ZWX\sim\Delta YXZ$

$\Delta WXZ\sim\Delta ZXY$

None of these

 $40\degree$  

 $50\degree$  

 $90\degree$  

 $12$  

 $40$  

 $24$  

 $6$  

 $12$  

 $40$  

 $24$  

 $6$  

 $12$  

 $\angle QRP\cong\angle TRS$  

 $\overline{PQ}\cong\overline{ST}$  

 $\overline{PR}\cong\overline{SR}$  

The triangles cannot be proven similar.

Yes

No

Cannot be determined