Task: Please answer the multiple choice question.
Question: Which molecule has the highest acute oral toxicity rat LD50?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any additional words.
Options:
[a] CCCOCC(C)O
[b] CON=C(C)C(=NOC(=O)N(C)SN(C)C(=O)Oc1cccc2c1OC(C)(C)C2)C(=O)N(C)C
[c] CCS(=O)CCSP(=S)(OC)OC
[d] CC(=O)CCc1ccc(-c2ccccc2)cc1
Answer: c
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}