The major ingredients in concrete are:

• A. Gravel and water
• B. Water cement aggregate
• C. Water cement
• D. Cement sand

Answer: (B)

Concrete relies on three elements: cement as the binder, water to hydrate the cement and allow curing, and aggregate to provide volume, strength, and structure (including both coarse gravel and fine sand). The option that lists water, cement, and aggregate correctly includes all three essential components, which is why it’s the best answer. A mix of gravel and water lacks a binding cement; a mix of water and cement without any aggregate won’t form the bulk and strength of concrete; and a mix of cement and sand without water (or without coarse aggregate) isn’t actual concrete.