Answer: The correct answer is Option 2.
Explanation:
Organic compounds are defined as those compounds in which a covalent bond is present between hydrogen and carbon atom. They are basically known as hydrocarbons. If any atom other than hydrogen and carbon is present, it is not considered as an organic compound.
From the given options:
Option 1: [tex]CaH_2[/tex]
A, calcium atom is present, so it is not considered as an organic compound.
Option 2: [tex]C_4H_8[/tex]
As., only carbon and hydrogen atom is only present, so it is considered as an organic compound.
Option 3: [tex]H_2O_2[/tex]
As, oxygen atom is present, so it is not considered as an organic compound.
Option 4: [tex]P_2O_5[/tex]
As, phosphorous and oxygen atoms are present, so it is not considered as an organic compound.
From the above information, the correct answer is Option 2.