Identify the tests to be conducted on pre-laminated particle boards in accordance with IS:12823:1990, from the tests listed below.
P - Test for density
Q-Test for swelling in water
R - Test for modulus of rupture
S - Test for screw withdrawal strength
T - Test for resistance to cigarette burn
U - Test for resistance to stain
1
Only P, Q, R, S
2
Only Q, R, S, U
3
Only P, Q, R, S, U
4
P, Q, R, S, T, U
5
Question Not Attempted