Final answer:
The common name for methanoic anhydride is formic anhydride, which is derived from formic acid by the removal of a molecule of water to form the anhydride.
Step-by-step explanation:
The compound commonly known as methanoic anhydride is derived from methanoic acid, which is better known as formic acid. An anhydride is a compound formed from another by the removal of a molecule of water. When two molecules of an acid combine and lose a molecule of water, they form an anhydride. Thus, the anhydride formed from methanoic acid would be called formic anhydride. Therefore, the correct answer to the question 'What is the common name for the compound shown as methanoic anhydride?' is d) Formic anhydride.