[单选题]
An object is 4.1 cm tal(gh3pmxc z,g(oe, c4wl e6:r bl, and 10.3 cm from a , h aix;axlqa/5 hj2tzzg(9;s converging lens. The image is virtual and 6.2 cmlqh9iz xxh;/jgza s2a ,;a(5t tall. What is the focal length of the lens?
A. $6.8 \; cm$
B. $10 \; cm$
C. $16 \; cm$
D. $30 \; cm$
