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. COc1ccc(C2OCOCC2C)cc1
b. CCNc1nc(NCC)nc(OC)n1
c. OC(c1ccc(F)cc1)(c1cncnc1)c1ccccc1Cl
d. CN1CCCN=C1C=Cc1cccs1
Answer: d
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}