In the following questions , a statement of assertion (A) is followed by a statement of reason (R).
A: Flatworms are dorso-ventrally flattened organisms. R: They are acoelomate and parenchyma cells originating from mesoderm fill up the cavities of the body.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false, then mark (3).
D. If both Assertion and Reason are false statements, then mark (4).