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 additional words.
Options:
a: CCCCCCCCCCCCCC(=O)NP(=O)(OC)SC
b: CC1=CCC2CC(CC3(CCC(C)C(C(C)C)O3)O2)OC(=O)C2C=C(C)C(O)C3OCC(=CC=CC(C)C1)C23O
c: CCOC(=S)SSSC(=S)OCC
d: CCN(CC)N=O
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}