&gt; is.na&#40;x&#41;
A. FALSE FALSE TRUE TRUE FALSE
B. FALSE TRUE TRUE TRUE FALSE
C. TRUE FALSE TRUE TRUE FALSE
D. None of the mentioned
Answer:A
&gt; is.na&#40;x&#41;
A. FALSE FALSE TRUE TRUE FALSE B. FALSE TRUE TRUE TRUE FALSE C. TRUE FALSE TRUE TRUE FALSE D. None of the mentioned
Explanation:Missing values are denoted by NA or NaN for q undefined mathematical operations. Sanfoundry Global Education & Learning Series – R Programming Language.