Task: Please answer the multiple choice question.
Question: Which molecule has the highest rat LD50 (oral exposure)?
Constraint: Even if you are not sure, you must pick either a, b, c, or d without using any other words.
Options:
a: CCOC(=S)SCSSCP(=O)(OCC)OCC
b: CCCCC(CC)C(=O)O[Si](C)(OC(=O)C(CC)CCCC)OC(=O)C(CC)CCCC
c: Cc1c(Cl)c([N+](=O)[O-])c2[nH]c(C(F)(F)F)nc2c1[N+](=O)[O-]
d: O=C1OC(=O)C2C1C1(Cl)C(Cl)=C(Cl)C2(Cl)C1(Cl)Cl
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}