The correct answer is C. Misery.
Bliss is a state of perfect happiness or contentment. It is often associated with feelings of joy, peace, and love. Misery, on the other hand, is a state of great unhappiness or suffering. It is often associated with feelings of pain, sadness, and despair.
Paradise and heaven are both often used to describe states of bliss or happiness. However, they can also be used to describe states of perfection or ideality. In this sense, they are not necessarily opposites of misery.
Happiness is a state of well-being and contentment. It is often associated with feelings of joy, satisfaction, and fulfillment. While happiness is not the same as bliss, it is also not necessarily the opposite of misery. It is possible to be happy even in the midst of difficult circumstances.
In conclusion, the only option that is truly opposite of bliss is misery.