Why is graphite a good conductor of electricity?

In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. Assertion and reason both are correct statements and reason is correct explanation for assertion Assertion and reason both are correct statements but reason is not correct explanation for assertion. Assertion is correct statement but reason is wrong statement. Assertion is wrong statement but reason is correct statement. Assertion: Graphite is a good conductor of electricity however diamond belongs to the category of insulators. Reason: Graphite is soft in nature on the other hand diamond is very hard and brittle.

Graphite is a good conductor of electricity because

Explain why a good conductor of heat is also a good conductor of electricity?

Which metal is a good conductor of electricity and heat ?

Two metals which are good conductors of electricity…………… .