Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a. O=CNC(N1CCN(C(NC=O)C(Cl)(Cl)Cl)CC1)C(Cl)(Cl)Cl
b. C=CC(=O)OCCC(C)OC(=O)C=C
c. CCCOC(=O)CCC(=O)N(CC)CC
d. CCCCOC(=O)CC#N
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}