Which is the richest source of plant protein?

Vitamin $B_{12}$ is most abundantly found in:

What are the components that cause damage to crops called?

Which one of the following is a disease of poultry?

Which fruit is the cheapest but provides the most energy?

Identify the incorrect statements from the following:
$(i)$ Increasing milk production capacity is an objective of animal breeding.
$(ii)$ Breeds of each domesticated animal show variations in their characteristics.
$(iii)$ Out-crossing involves breeding between a male and a female of two different species.
$(iv)$ $A$ mule is an example of interspecific hybridization.