Every option here is a subset of the one before it in coverage, which is the classic shape of a "how far does the group extend" question. The safest method is to recall how Part III is laid out. The fundamental rights are printed under bold headings, and the framers grouped Articles 14 to 18 under the heading Right to Equality, Articles 19 to 22 under Right to Freedom, and so on. So the answer is not a matter of opinion, it is printed in the Constitution.
So option (A) is the answer. A useful way to remember Articles 17 and 18 is to see what each abolishes. One kills a social hierarchy imposed by birth, the other kills a hierarchy conferred by the State. Both are equality provisions in substance, not just by placement.
Let's summarize:
The Right to Equality is guaranteed by Articles 14 to 18, so option (A) is correct.