A. The hull is divided into a number of watertight compartments.
B. The hull is divided into a number of gastight compartments.
C. The hull is divided into a number of water compartments.
D. The hull is divided into a number of tight compartments.

A. Varnish gives a clear protective coat to steelwork.
B. Primer gives a clear protective coat to woodwork.
C. Varnish gives a clear protective coat to woodwork.
D. Primer gives a clear protective coat to metalwork.