For which of the following acts is performing Wudu classified as strictly Fard (obligatory) according to the text?

Wudu: When It Is Fard, Wajib, or Recommended

• For performing the circumambulation (Tawaf) of the Ka'bah.
• For performing the Funeral Prayer (Janazah).
• For sleeping in a state of purity.
• For reading an ordinary book while already in Wudu.