Please answer this question?

 

Assalam-o-Alaikum
Please answer this question

Problem #	a	b	c
	2 + 7 + 5 + 4 + 1	2 + 7 + 5 + 4 + 1	2 + 7 + 5 + 4 + 1
Answer	13	23	19

 

Which answer is right? a, b or c

Azfar

Quran 16:90 Allah commands justice, the doing of good, and liberality to kith and kin, and He forbids all shameful deeds, and injustice and rebellion: He instructs you, that ye may receive admonition.