Several mutants (1-4) are isolated, all of which require compound e for growth. the compounds a to d in the biosynthetic pathway to e are known, but their order

Several mutants (1-4) are isolated, all of which require compound E for growth. The compounds A to D in the biosynthetic pathway to E are known, but their order in the pathway is not known. Each compound is tested for its ability to support the growth of each mutant (1-4). In the following table, a plus sign indicates growth and a minus sign indicates no growth. Medium supplemented with conpound Mutant A B C D E What is the order of the compounds (A to E) in the pathway? . EDCBA 2. A C DBE 3. EB D-CA 4. A B^ C» DE