Final answer:
The correct way to write a dose of 1/2 ml of Metacam is 1/2 ml.
Step-by-step explanation:
The correct way to write a dose of 1/2 ml of Metacam to be given under the skin is a) 1/2 ml. The dose should be written as the actual amount to be administered, which in this case is 1/2 ml. Options b) 1 ml, c) 2 ml, and d) 1.5 ml are incorrect because they do not represent the prescribed dose accurately.