Assertion: From evolutionary point of view, human gestation period is believed to the shortening
Reason: One major evolutionary trend in humans has been larger head undergoing faster growth rate in the foetal stage.

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
B. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.
C. If Assertion is true but the Reason is false.
D. If both Assertion and Reason are false.

Answer

To solve the question regarding the assertion and reason, we will analyze each statement step by step.

### Step 1: Analyze the Assertion
The assertion states: "From an evolutionary point of view, the human gestation period is believed to be shortening."

- **Evaluation**: This statement is generally considered incorrect. The human gestation period is approximately 9 months, which is longer than that of many other primates. While there may be discussions about trends in gestation periods across species, the assertion that it is shortening is not widely supported in evolutionary biology.

### Step 2: Analyze the Reason
The reason states: "One major evolutionary trend in humans has been larger head undergoing faster growth rate in the fetal stage."

- **Evaluation**: This statement is also incorrect. While it is true that human infants have relatively large heads compared to their body size, the growth rate of the head during the fetal stage does not necessarily imply that the gestation period is shortening. In fact, larger head sizes can lead to complications during birth, which is a significant factor in the evolutionary considerations of human gestation.

### Step 3: Determine the Relationship
Now we need to determine if the reason is a correct explanation of the assertion.

- **Evaluation**: Since both the assertion and the reason are incorrect, the reason does not provide a correct explanation for the assertion. Therefore, the relationship between the two statements is not valid.

### Conclusion
Both the assertion and the reason are false, and the reason does not correctly explain the assertion.

### Final Answer
The correct answer is: Both the assertion and the reason are false.

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