Отметь формулу \(2\)-аминобутановой кислоты.

• (\begin{equation*}
  \begin{array}{l}
  \underline{C}H_2 - CH_2 - CH_2 - COOH \
  NH_2
  \end{array}
  \end{equation*})
• \(\begin{align*} \begin{array}{l} \underset{|}{C}H_2 - \underset{|}{C}H - COOH \\ CH_3 \qquad \qquad \qquad NH_2 \end{array} \end{align*}\)
• (\begin{equation*}
  \begin{aligned}
  CH_3-CH_2-\underset{|}{C}H-COOH \
  ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,\ NH_2
  \end{aligned}
  \end{equation*})
• (\begin{equation*}
  \begin{array}{l}
  CH_3-\underset{|}{C}H-CH_2-COOH \
  ,,,,,,,,,,,,,,,,,,,,,,NH_2
  \end{array}
  \end{equation*})