input with options: Q: Does overhead irrigation or drip irrigation use less water? A:
OPTIONS:
- mist irrigation
- stream irrigation
- constant flow
- drip irrigation
output: drip irrigation

input with options: Q: Lack of what mineral causes rickets? A:
OPTIONS:
- zinc
- potassium
- magnesium
- calcium
output: calcium

input with options: Q: What is the name of the line used in topographic maps that shows different elevations? A:
OPTIONS:
- a patch line
- a crater line
- a curve line
- a contour line
output: a contour line

input with options: Q: What is the study of the similarities and differences in the embryos of different species? A:
OPTIONS:
- example embryology
- prenatal biology
- diversified embryology
- comparative embryology
output:
comparative embryology