Final answer:
The most accurate and complete list of side effects for contraceptive injections includes weight gain, increased blood levels of LDL cholesterol and insulin, decreased blood levels of HDL cholesterol, and decreased bone density.
Step-by-step explanation:
Out of the given options, the most accurate and complete list of side effects for contraceptive injections is option 3: Weight gain, increased blood levels of LDL cholesterol and insulin, decreased blood levels of HDL cholesterol, and decreased bone density.
Weight gain is a common side effect of contraceptive injections, as well as increased blood levels of LDL cholesterol and insulin. These injections can also lead to a decrease in the levels of HDL cholesterol and bone density.