Graduate Pharmacy Aptitude Test (GPAT) 2012 Solved Paper

Study the following statements about Gram staining:
[P]: Gram positive bacteria are stained deep violet and Gram negative bacteria are stained red.
[Q]: Gram positive bacteria are stained red and Gram negative bacteria are stained deep violet.
[R] : The sequence of addition of staining reagents is crystal violet, iodine solution, alcohol and safranin.
[S] : In Gram positive bacteria the purple color developed during staining is lost during alcohol treatment.
The cells bater take up the safranin and stain red
Choose the correct combination of statements.