पोंछने के बाद ब्लैकबोर्ड सूख जाता है: , Blackboard dries up after wiping it:

A. वाष्पीकरण (Condensation)

B. भाप (Evaporation)

C. आसवन (Distillation)

D. छानने का काम (Filtration)

Correct Answer :

B. भाप

Explanation

Blackboards dries up other wiping it is the process of evaporation.