Point out the wrong statement?
(a) is.rel reports whether x is a theme object
(b) is.theme reports whether x is a theme object
(c) opts build a theme (or partial theme) from theme elements
(d) theme_bw is theme with grey background and white gridlines
The question was asked in an interview for internship.
My doubt stems from ggplot2 topic in section Profiling, Simulation and Data Analysis of R Programming
Select the correct answer from above options
