Identify B formed in the reaction.
$$Cl-(CH_2)_4-Cl \xrightarrow{excess\ NH_3} A \xrightarrow{NaOH} B + H_2O + NaCl$$

A

B

$$H_2N-(CH_2)_4-NH_2$$

C

$$^{-}ClH_3N^{+}-(CH_2)_4-^{+}NH_3Cl^{-}$$

D