Task: Please answer the multiple choice question.
Question: Which molecules are Ames mutagenic?
Constraint: You must select none, one or more options from a, b, or c without using any additional words.
Options:
a: O=C(NO)c1ccccc1
b: Nc1cc(S(=O)(=O)O)c2cccc(S(=O)(=O)O)c2c1
c: CCOC(=O)CNC(=O)CCCCSc1[nH]cnc2ncnc1-2
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}