Author: Hasnain Ali

A. XY
B. XX
C. XXY
D. XXX

Submitted by: Hasnain Ali

A. Vitamin B1
B. Vitamin B6
C. Vitamin B9
D. Vitamin B12

Submitted by: Hasnain Ali

A. O1
B. O2
C. O3
D. O4

Submitted by: Hasnain Ali