Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity (LD50 in rats)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
(a) CCCCCOc1ccc(Br)cc1COCCN(CC)CC
(b) Cc1cccc(C)c1N(COC(C)C)C(=O)CCl
(c) CCOP(=S)(OCC)SCn1c(=O)oc2cc(Cl)ccc21
(d) COP(=S)(OC)Sc1ccc(Cl)cc1
Answer: d
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}