The term "Unnatural offences" is a legal description used within the Indian legal system.
These specific offences are defined under the provisions of the Indian Penal Code (IPC).
Section 377 of the Indian Penal Code explicitly defines and addresses acts considered "unnatural offences".
Therefore, the correct section is Option A.
Whoever distributes any obscene object to a person under__________years of age is guilty of an offence.