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=CCOc1ccccc1OC(=O)NC
b: COCC(=O)N(c1c(C)cccc1C)N1CCOC1=O
c: C=CCN(CC=C)c1c(C)cc(OC(=O)NC)cc1C
d: CNC(=O)Oc1ccccc1Cl
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}