JEE Main 2021 Chemistry question

An organic compound 'A' on treatment with yields compound 'B' . Compound 'A' also yields compound 'B' on ozonolysis. Compound 'A' is :

• (A)2-MethylpropeneCorrect
• (B)1–Methylcyclopropane
• (C)But–2–ene
• (D)Cyclobutane