What is the correct IUPAC name of the compound?

The descending order of basicity of the following amines is :

(D) $ \mathrm{CH}_3 \mathrm{NH}_2$

(E) $\left(\mathrm{CH}_3\right)_2 \mathrm{NH}$

Choose the correct answer from the options given below :

The number of optically active products obtained from the complete ozonolysis of the given compound is :

Which of the following is the correct IUPAC name of given organic compound (X)?