Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, or d without using any other words.
Options:
[a] CCCCC(CC)CO[Si](OCC(CC)CC)(OCC(CC)CC)OCC(CC)CCCC
[b] CCOP(=O)(OC=C(Cl)Cl)OCC
[c] Cc1cc(C(=O)Nc2ccccc2)c(C)o1
[d] CCCCC(CC)CN
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}