Concept:Tayammum is the dry ritual purification using clean earth or dust when water is not available.
Explanation:In Islam, Muslims normally purify themselves with water before prayer.
When no clean water is found, or using water is harmful, Allah permits tayammum.
The Qur'an says: "...and you find no water, then perform tayammum with clean earth and rub therewith your faces and hands." (Qur'an 5:6).
The other options are not forms of purification without water.
Janabah is a state of major impurity, not an act of purification.
Janazah refers to the funeral prayer.
Taslim is the final salutation in prayer.
Therefore, the purification done without water is tayammum.
Answer:B. Tayammum