Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any additional words.
Options:
a: CCSC(=O)N(CC(C)C)CC(C)C
b: CC1CC=CCC1COC(=O)CCCCC(=O)OCC1CC=CCC1C
c: C=CC(=O)OCCSC
d: NS(=O)(=O)CCNC(=O)N(CCCl)N=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}