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:A rectangular image consisting of black lines and…From what are carbonaceous types of sedimentary…The soft solder used for welding and plumbing is alloy of?Two magnets are used to magnetize a soft iron bar PQ…Assuming that brown colour is dominant over black…