Task: Please answer the multiple choice question.
Question: Which molecule has the highest LD50 in rats (oral exposure)?
Constraint: Even if you are uncertain, you must pick either a, b, c, d, or e without using any additional words.
Options:
a. CCN(CCNS(C)(=O)=O)c1ccc(N)c(C)c1
b. Cc1onc2c(=O)n(C)nc(-c3ccccc3)c12
c. O=S(=O)(O)c1ccc2ccccc2c1
d. N#CSc1cccc(C(=O)O)c1
e. CCC(C)CC(CC)Nc1ccc(NC(CC)CC(C)CC)cc1
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}