Task: Please answer the multiple choice question.
Question: Which molecules are not Ames mutagenic?
Constraint: You must select none, one or more options from a, b, c, or d without using any additional words.
Options:
a: CCC(C)c1cc([N+](=O)[O-])cc([N+](=O)[O-])c1O
b: C1CC2OC2C1OC1CCC2OC12
c: COc1cc([N+](=O)[O-])ccc1N
d: O=C(O)c1ccc(Cl)c([N+](=O)[O-])c1
Answer: a, b
Task: Please answer the multiple choice question.
Question: Which molecules are {mutagenic#not &NULL}{mutagenic__names__adjective}?
Constraint: You must select none, one or more options from {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%mutagenic%}
Answer: {%multiple_choice_result}