A. Helium
B. Hydrogen
C. Carbon
D. Chlorine
Submitted by: Amjad Ali Kosh
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
