&gt; ncol&#40;x&#41;
A. 2
B. 4
C. 7
D. All of the mentioned
Answer:A
&gt; ncol&#40;x&#41;
A. 2 B. 4 C. 7 D. All of the mentioned
Explanation:Data frames are represented as a special type of list where every element of the list has to have the same length. 5. Point out the correct statement :