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. CCCSP(=S)(OCC)Oc1cnn(-c2ccccc2)c(=O)c1OC
b. O=P(OCCCl)(OCCCl)OCCCl
c. C=C(C)C1CC=C(C)C(O)C1
d. CN1CCC(=C2c3ccccc3Sc3ccccc32)CC1
Answer: b
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}