According to the theory of spontaneous generation :

Options

A. Life originated from outer space
B. Life orginated from decaying and rotting matter like straw, mud etc.
C. Life came from pre-existing life
D. Life came from both living and non-living matter.

Answer

**Step-by-Step Solution:**

1. **Understanding Spontaneous Generation**: The theory of spontaneous generation posits that life can arise from non-living matter. This concept suggests that under certain conditions, living organisms can emerge from decaying organic substances.

2. **Evaluating the Options**:
- **Option 1**: "Life originated from outer space." This option is incorrect because spontaneous generation does not involve extraterrestrial origins for life.
- **Option 2**: "Life originated from decaying and rotting matter like scrub, mud, etc." This option aligns with the theory of spontaneous generation, as it suggests that life can emerge from non-living organic materials.
- **Option 3**: "Life comes from pre-existing life." This statement is associated with the biogenesis theory, which contradicts the spontaneous generation theory, making this option incorrect.
- **Option 4**: "Life comes from both living and non-living matter." This option is also incorrect as it does not accurately represent the spontaneous generation theory, which focuses solely on non-living matter giving rise to life.

3. **Conclusion**: The correct answer is Option 2, which states that life originated from decaying and rotting matter. This reflects the core idea of spontaneous generation.