Generally, alternate bearing problem is noticed in fruit trees

Answer: Option B

Generally, the alternate bearing problem is noticed in fruit trees like Guava.
Alternate Bearing (AB) is an alternating cropping pattern of large trees and small crops occurring in many fruit species that is internally regulated by the plant.
In other words, it is the one that does not bear a regular crop year after year, rather heavy yields are followed by extremely light yields and vice versa. Alternate bearing is a widely spread phenomenon, occurring in both deciduous and evergreen fruit plants.