A science teacher labelled three glass slides as P, 0 and R. She painted slide Q with light blue colour, slide R with black colour and slide P was left as such.Then she asked students to put the slide on a white paper having (X) mark on it. Students will be able to see the mark clearly (or partially)

• A. In slide P as it is translucent
• B. In slide Q as it is translucent
• C. In slide R as it is opaque
• D. In all the slides as paint does not change the nature of glass.