The interplaner distance in a crystal is $2.8\times 10^{-8}$ m. The value of maximum wavelength which can be diffracted

Question

( A ) $5.6 \times 10^{-8} m$
( B ) $7.6 \times 10^{-8} m$
( C ) $2.8 \times 10^{-8} m$
( D ) $1.4 \times 10^{-8} m$