Which of the following is the most suitable for the construction of a pillar ?

Options

A. Cement mortar
B. Concrete
C. RCC
D. Pure cenment

Explanation

To determine which material is most suitable for the construction of a pillar, we can analyze the options provided:

1. **Cement Mortar**:
- Cement mortar is primarily used for finishing walls and surfaces. It provides a neat finish but lacks the structural strength required for load-bearing applications like pillars. Therefore, this option is not suitable for pillar construction.

2. **Concrete**:
- Concrete is a strong material that is commonly used for constructing roads and footpaths. However, while it has good compressive strength, it may not be the best choice for pillars on its own, as it can be brittle and may not withstand tensile forces effectively.

3. **Reinforced Cement Concrete (RCC)**:
- RCC is a composite material that combines concrete with reinforcement (usually steel bars). This combination enhances the tensile strength of concrete, making it ideal for construction applications where strength and durability are crucial, such as in pillars. RCC is widely used in the construction of bridges, buildings, and other structures that require strong support.

4. **Pure Cement**:
- Pure cement is not used for constructing pillars as it does not have the necessary structural integrity. It is typically mixed with aggregates and water to form concrete.

Based on this analysis, the most suitable material for the construction of a pillar is **Reinforced Cement Concrete (RCC)**.

### Final Answer:
**Reinforced Cement Concrete (RCC)** is the most suitable for the construction of a pillar.