Questions: Which can be a cause of pallor? Cold temperatures Liver malfunctions Bacterial infection Increased blood supply

The answer is the first one: Cold temperatures.

Explanation for each option:

1. Cold temperatures: Correct. Cold temperatures can cause pallor because they lead to vasoconstriction, which reduces blood flow to the skin, making it appear paler.

2. Liver malfunctions: Incorrect. Liver malfunctions typically cause jaundice, which is a yellowing of the skin, rather than pallor.

3. Bacterial infection: Incorrect. While some infections can cause pallor due to anemia or other systemic effects, bacterial infections are not a direct cause of pallor.

4. Increased blood supply: Incorrect. Increased blood supply would generally cause redness or flushing, not pallor.

In summary, cold temperatures can lead to pallor due to reduced blood flow to the skin.