Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, d, or e without using any additional words.
Options:
a O=C1OCCN1N=Cc1ccc([N+](=O)[O-])o1
b Cc1ccccc1C(=O)N=C1NCCS1
c O=P(OC(CCl)CCl)(OC(CCl)CCl)OC(CCl)CCl
d CCOCCOC(C)=O
e C1CCNC1
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}