Đáp án:
$\rm C.\ X, Z$
Giải thích các bước giải:
\(\rm CH_3CH=CHCH_3:\\
\begin{array}{|c|cc|}
\hline
\rm CH_3\qquad H&\rm \quad CH_3\qquad CH_3\\
\backslash\qquad /&\backslash\qquad /\\
\rm C = C&\rm C = C\\
/\qquad \backslash&/\qquad \backslash\\
\rm\quad H\qquad CH_3\ \ \ &\rm H\qquad\ \ \ H\\
\hline
\end{array}\\
CH_3CH=CHCH_2CH_3:\\
\begin{array}{|c|cc|}
\hline
\rm CH_3\qquad H&\rm \quad CH_3 \qquad C_2H_5\\
\backslash\qquad /&\backslash\qquad /\\
\rm C = C&\rm C = C\\
/\qquad \backslash&/\qquad \backslash\\
\rm \ \ \ H\qquad C_2H_5&\rm H\qquad\ \ \ H\\
\hline
\end{array}\)
