Pick up the incorrect statement from the following: In a dry dock block made of hard wood,

• A. spacing of the blocks is 1.35 m
• B. the lowest block is 1.8 m long 40 cm x 40 cm in cross-section
• C. the middle block is 1.6 m long 40 cm x 40 cm in crosss-section
• D. none of these.