Which two of the below given points are known as the twin characteristics growth ?
(i) Increase in mass
(ii) Increase in number of individuals
(iii) Cellular organisation
(iv) Cellular differentiation

Options

A. (i) and (ii)
B. (i) nad (iii)
C. (ii) and (iii)
D. (iii) and (iv)

Explanation

To determine the twin characteristics of growth from the given options, we can analyze each option step by step:

1. **Understanding Growth**: Growth in biological terms typically refers to an increase in size or mass of an organism, as well as an increase in the number of individuals in a population.

2. **Analyzing the Options**:
- **(i) Increase in mass**: This refers to the growth of an individual organism, which occurs through processes like cell division and accumulation of cellular materials.
- **(ii) Increase in number of individuals**: This pertains to reproduction, where organisms produce offspring, leading to an increase in the population size.
- **(iii) Cellular organization**: This refers to the arrangement and organization of cells within an organism, which is more about the complexity of structure rather than growth itself.
- **(iv) Cellular differentiation**: This is the process by which cells become specialized for specific functions, which is important for development but not directly a characteristic of growth.

3. **Identifying Twin Characteristics**: The two characteristics that directly relate to growth are:
- **Increase in mass (i)**: This is a characteristic of growth at the individual level.
- **Increase in number of individuals (ii)**: This is a characteristic of growth at the population level.

4. **Conclusion**: Therefore, the two points that are known as the twin characteristics of growth are:
- **(i) Increase in mass**
- **(ii) Increase in number of individuals**

### Final Answer:
The twin characteristics of growth are (i) Increase in mass and (ii) Increase in number of individuals.