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Question
In the list of animals given below, hen is the odd one out.
| human being | cow | dog | hen |
The reason for this is
Options
it undergoes internal fertilisation
it is oviparous
it is viviparous
it undergoes external fertilisation
Solution
it is oviparous
Explanation -
Hen is odd one out because it is oviparous, i.e. it lays egg from which young ones are hatched later on.
The rest three (human being, cow and dog) are viviparous, i.e. give birth to young ones after they are fully developed.
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