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. Cc1ccc2[nH]nnc2c1
b. COc1ccc([N+](=O)[O-])cc1
c. CCOP(=O)(OCC)Oc1ccc([N+](=O)[O-])cc1
d. Cc1c2ccncc2c(C)c2c1[nH]c1ccccc12
Answer: a
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}