Why is 3-aminopentane achiral while 3-aminohexane is chiral?

• A. Because 3-aminopentane does not have four different groups attached to the carbon and has a plane of symmetry, while 3-aminohexane has four different groups attached to the carbon and does not have a plane of symmetry.
• B. Because 3-aminopentane has four different groups attached to the carbon and does not have a plane of symmetry, while 3-aminohexane does not have four different groups attached to the carbon and has a plane of symmetry.
• C. Because 3-aminopentane has four different groups attached to the carbon and has a plane of symmetry, while 3-aminohexane does not have four different groups attached to the carbon and does not have a plane of symmetry.
• D. Because 3-aminopentane does not have four different groups attached to the carbon and does not have a plane of symmetry, while 3-aminohexane has four different groups attached to the carbon and has a plane of symmetry.

Answer: (A)