Assertion (A) : Group of classes with similar distinctive characteristics constitute a phylum.
Reason (R) These classes share some common features like presence of a notochord and a dorsal tubular nerve cord. :

Options

A. Both (A) and (R) are wrong
B. (A) is correct and (R) is wrong
C. (A) is correct and (R) explains (A)
D. (A) is wrong and (R) is correct

Answer

A, C, D