Which of the following statements is not correct?

• A
  $d$-block and $f$-block elements form ionic hydrides.
• B
  $BeH_2$,$MgH_2$,$CuH_2$,and $HgH_2$ are intermediate hydrides.
• C
  $p$-block elements form covalent hydrides.
• D
  Except for $Be$ and $Mg$,$s$-block elements form ionic hydrides.