Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
(a) C=CCN(CC=C)C(=O)CSP(=S)(OCC)OCC
(b) CN(C)CCC=C1c2ccccc2CCc2ccccc21
(c) COc1ccc2c(-c3ccc(OCC(O)CNC(C)C)cc3)c(-c3ccccc3)c(=O)oc2c1
(d) Cc1cc(Cl)cc(Sc2cc(Cl)cc(C)c2O)c1O
Answer: a
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}