The Hinsberg test of the compound X produces a solid compound Y that is insoluble in 10 % aq. NaOH. Y dissolves in 10 % aq. sulphuric acid. The compound X is

A

$$\text{NH}_2\text{CH}_2\text{CH}_2\text{CH}_2\text{N}(\text{CH}_3)_2$$

B

$$(\text{CH}_3)_2\text{NCH}_2\text{CH}_2\text{NHCH}_3$$

C

$$\text{NH}_2\text{CH}_2\text{C}(\text{CH}_3)_2\text{CH}_2\text{NH}_2$$

D

$$(\text{CH}_3)_2\text{NCH}_2\text{N}(\text{CH}_3)_2$$