$***$ Question Completion Status:

QUESTION $1$

If a diagnostic code consists of $7$ characters with the $5$ th character a placeholder, which format is correct when writing the code?

a$.$ T$36\mathrm{.}001$A

b$.T36\mathrm{.}01A$

c$.$ T$36\mathrm{.}0?1$A

d$.$ T$36\mathrm{.}0-1$A