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. C(Oc1nc(OCC2CO2)nc(OCC2CO2)n1)C1CO1
b. CCOC1CCC=CO1
c. CCOC(=O)c1c(C)cc2nc(COC(=O)NC)n(-c3ccccc3Cl)c(=O)c2c1C
d. CCC(CO)NC(=O)C1C=C2c3cccc4[nH]cc(c34)CC2N(C)C1
Answer: b
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}