Choose the correct statement(s)
A. O3 in stratosphere is not completely effective in shielding us from UV-B
B. UV-A is biologically least harmful.
C. Chapman mechanism deals with only O3 formation in stratosphere.
D. Sunscreen lotions either reflect or absorb or scatter UV-B and UV-A
E. UV-B helps in dissociation of O3 molecule in stratosphere.
Choose the correct answer from the options given below.
1
B, C, D and E only
2
A, B, D, and E only
3
A, C, D and E only
4
A, B, and C only