For the assertion and reason given below find the correct option.
Assertion:
Carbon is non-metal.
Reason:
Carbon atoms can bond with each other.
A.Both assertion and reason are correct and reason is the correct explanation for the assertion.
B.Both assertion and reason are correct but reason is the not the correct explanation for the assertion.
C.Assertion is correct but reason is incorrect.
D.Both assertion and reason are incorrect.

Hint: We know that, Carbon is an element with an atomic number $6$ . It belongs to group 14 of the periodic table. It is a nonmetallic tetravalent atom, which means it can form four covalent bonds. The carbon cannot form ionic bonds because it has a valency of $4$. Thus, it cannot gain or lose four electrons for bonding. Hence, it forms covalent bonds with other atoms.

Complete step by step answer:
We have to remember that in the periodic table, all the elements of group 14 are non-metals. Hence, carbon is also a non-metal.
Here, we have established that the assertion is correct.
We also know that the carbon is a tetravalent atom which can form four covalent bonds and not ionic bonds. Carbon has a distinct property of forming bonds in diverse ways which results in various allotropes of carbon. The widely known allotropes of carbon are graphite, diamond and Buckminsterfullerene.
If we see all the allotropes of carbon they are formed by covalent bonding between carbon-carbon atoms. Carbon-carbon single bond is a sigma bond and is formed between one hybridized orbital from each of the carbon atoms.
Hence, from this study we have found out that the assertion is also correct, but there is no explanation that if carbon is a non-metal then it can form bonds with its atoms.
Hence, the correct answer to the question is option B.

Note:
We have to remember that the different allotropes of carbon are formed naturally in nature due to its distinct property of forming covalent bonding with its atoms. If we look at the structure of diamond the carbon atoms bond in tetrahedron form. If we look at the structure of graphite it is a two-dimensional structure forming layers of carbon sheets stacked one above the other. And lastly the Buckminsterfullerene is like a football with carbon forming a ball like structure.