A soft; black opaque carbonaceous rock that can be used to make pencil is? by Sunday | Jan 1 | Geography JAMB | 0 comments A. lignite B. graphite C. lead D. coal Correct Answer: Option B – graphite Users Also Read These:Two-organic substances are labelled K and L if K…A rectangular image consisting of black lines and…From what are carbonaceous types of sedimentary…A basin where rock layers have been folded and in…Assuming that brown colour is dominant over black…