[单选题]
Light of wavelength m8-:k:u bs hba610 nm is incident on a slit 0.20 mm wide a o ;9: *vzjcle,g0eknznd the diffraction pattern is produced ov *ez:g lc90 ,;ozjenkn a screen that is 1.5 m from the slit. What is the width of the central maximum?
A. $0.34 \; cm$
B. $0.68 \; cm$
C. $0.92 \; cm$
D. $1.2 \; cm$