A sow is an adult female pig. The average gestation period (the time from successful mating to farrowing, i.e., giving birth) in a sow is approximately 114 days. This is commonly remembered using the "3-3-3" rule: 3 months, 3 weeks, and 3 days, which equals about 114 days.
The other options correspond to gestation periods of different farm animals:
283 days (approximately 9 months) is the average gestation period for cattle (cows).
148-151 days (approximately 5 months) is the average gestation period for goats and sheep (does/ewes).
30 days (approximately 1 month) is close to the gestation period for rabbits (about 28-32 days).
Examination tip: Memorise the key gestation periods - Rabbit ~30 days, Pig ~114 days, Sheep/Goat ~150 days, Cattle ~283 days, Horse ~336 days. These are frequently tested.
