Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a) CN1C(C(=O)Nc2ccccn2)=C(O)c2sc(Cl)cc2S1(=O)=O
b) NC(=O)OCC(O)C(O)C(N)C(=O)NC(C(=O)O)C1OC(n2cc(CO)c(=O)[nH]c2=O)C(O)C1O
c) CCOC(C1=NCC(C)CN1)c1ccc(Cl)cc1
d) NC(Cc1ccc(Oc2ccc(N(CCCl)CCCl)cc2)cc1)C(=O)O
Answer: c
Task: Please answer the multiple choice question.
Question: Which molecule has the highest {acute_toxicity__names__noun}?
Constraint: Even if you are {#uncertain|not sure!}, you must pick either {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%acute_toxicity%}
Answer: {%multiple_choice_result}