Which of the following C declarations $($contextual level$)$ will cause a compilation issue?

Group of answer choices

int b$[2]$;

int a$[]=\{12,24\}$;

int d$[]=\{12\mathrm{.}24,47\mathrm{.}13\}$;

int c$[]=\{\text{'}$a$\text{'},\text{'}$b$\text{'},\text{'}\backslash 0\text{'}\}$;