The Jersey bull used for cross-breeding is an exotic variety from-
C. Switzerland
D. Holland

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Hint:As the name implies, Jersey is a British breed of dairy cattle that had been bred on the British Channel Island of Jersey, in 1771.

Complete solution: Let us try to understand the terms first that have been used in the question, such as exotic, cross-breeding. This will help us in creating a better understanding.
•The term exotic means foreign, something which is not native. Exotic varieties are produced somewhere and then brought to the desired place.
•Cross breeding is used to refer to the process of the mating of animals belonging to two different breeds.
•The Jersey breed is one of the most popular breeds in the world today. They can be easily recognized because of their smaller stature. They possess excellent udders and tremendous dairy character. Jersey cattle were first introduced to the United States in the 1850s, which is way long after it got introduced in the UK (1771).
•The major factors that contribute towards the popularity of this breed are- their excellent adaptability to all climates, their ability to live long productive lives, and the most important is that they are one of the easiest calving breeds, despite their sizes.
•Jersey bulls (similar to other Jersey breeds) are small in stature but are extremely masculine. They have been found to be muscular about their crests and shoulders. They are considerably less refined throughout as compared to the females.
•They weigh in the ranges from 1200 to 1800 pounds, but as in the females, medium weights are usually preferred. Jersey bulls are most popular for having the least docile temperament of the common breeds of cattle.

So, the correct option is B.

Note: Jersey milk is the most efficient of all dairy breeds due to their smaller capacity compared to their high component milk output. This breed has been found to be the most suitable one because of its quality of milk, which is used for the preparation of sweets and ice-cream.