Two point sources `S_(1)` and `S_(2)` are 24 cm apart. What should a convex lens of focal length 9 cm be placed between them so that the images of both sources formed at the same place ?
A. 6 cm from `S_(1)`
B. 15 cm from `S_(1)`
C. 10 cm from `S_(1)`
D. 12 cm from `S_(1)`