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, or d without using any additional words.
Options:
a. Cc1c(Cl)c(=O)oc2cc(OP(=O)(OCCCCl)OCCCCl)ccc12
b. CCCC#N
c. CCC(=O)C1(N2CCCCC2)CCN(CCCC(=O)c2ccc(F)cc2)CC1
d. CC(=C(CCO)SSCC1CCCO1)N(C=O)Cc1cnc(C)nc1N
Answer: b
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}