Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
(a) O=C(C(F)(F)Cl)C(F)(F)Cl
(b) COP(=O)(OC)OC(C)=CC(=O)N(C)C
(c) C[Si](C)(C)N=C=N[Si](C)(C)C
(d) C=C(O)CC(c1ccccc1)c1c(O)c2ccccc2oc1=O
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}