Number of Animals in the Caravan:
- Hens: 50
- Goats: 45
- Camels: 8

Number of Keepers: Unknown

Number of Feet and Heads:
- Total number of feet: 224 more than the number of heads

To find the number of keepers, we need to analyze the information given and determine the relationship between the number of feet, heads, and animals in the caravan.

Number of Heads:
- Hens: Each hen has one head, so the number of heads for the hens is 50.
- Goats: Each goat also has one head, so the number of heads for the goats is 45.
- Camels: Each camel has one head, so the number of heads for the camels is 8.

Total Number of Heads: 50 + 45 + 8 = 103

Number of Feet:
- Hens: Each hen has two feet, so the number of feet for the hens is 50 * 2 = 100.
- Goats: Each goat has four feet, so the number of feet for the goats is 45 * 4 = 180.
- Camels: Each camel has four feet, so the number of feet for the camels is 8 * 4 = 32.

Total Number of Feet: 100 + 180 + 32 = 312

Relationship between Feet and Heads:
- The total number of feet is 224 more than the number of heads.
- Therefore, 312 = 103 + 224.

Number of Keepers:
- Now, we need to find the number of keepers in the caravan.
- Each keeper has two feet and one head.
- So, the number of keepers can be calculated by subtracting the number of animal feet and heads from the total feet and heads.

Number of Keepers = (Total Number of Feet - Number of Animal Feet) / 2 + (Total Number of Heads - Number of Animal Heads) / 1
= (312 - (100 + 180 + 32)) / 2 + (103 - (50 + 45 + 8)) / 1
= (312 - 312) / 2 + (103 - 103) / 1
= 0 / 2 + 0 / 1
= 0 + 0
= 0

The number of keepers is 0, which indicates that there are no keepers in the caravan. However, the options provided in the answer choices do not include 0 as a possible answer. Therefore, there may be an error in the question or answer choices provided.