input with options: Q: What is the smallest class of elements? A:
OPTIONS:
- halogens
- noble gases
- synthetics
- metalloids
output: metalloids

input with options: Q: What is an isotope that is radioactive called? A:
OPTIONS:
- isotopes
- matured isotope
- radionuclides
- radioisotopes
output: radioisotopes

input with options: Q: What takes over the synthesis and secretion of progesterone throughout pregnancy as the corpus luteum degenerates? A:
OPTIONS:
- vagina
- uterus
- ovaries
- placenta
output: placenta

input with options: Q: What are the building blocks of life? A:
OPTIONS:
- muscles
- seeds
- bricks
- cells
output:
cells