The question asks for the correct sequence of steps in a scientific investigation. To answer this, let's break down each component of scientific investigation:

1. Conceptualization: This is the initial step where a researcher identifies a problem and formulates a conceptual framework or hypothesis to investigate.
2. Theorizing: Based on the conceptual framework, theories are developed to explain the phenomena being studied.
3. Deduced Consequences: From the theories, certain consequences or predictions are logically deduced. These help in guiding what needs to be observed or tested.
4. Observation and Testing: Finally, experiments or observations are conducted to test the deduced predictions. This helps in validating or refuting the theories and hypotheses.

The correct sequence follows the logical flow of starting with an idea, developing theories, predicting outcomes, and finally testing those predictions. The correct option according to this sequence is:

1. Conceptualization, theorizing, deduced consequences, observation and testing.

This sequence logically follows the steps of the scientific method. The other options do not reflect this logical progression as accurately.