Arun and Bhavna established a limited liability company with a share capital of Rs $24,000.$ They contributed Rs $12,000$ each as equity capital. After one year, the company has Rs $30,000$ in cash and Rs $40,000$ in unpaid bills. Arun and Bhavna has personal cash of Rs $10,000$ each and no debt. What is the status of their company's solvency?

a$.$ Can't say from the given data.

b$.$ Both the shareholders will become insolvent.

c$.$ Since their liability is limited to the agreed upon contributed capital, they need not bring in any cash.

d$.$ They have to pay back the unpaid bills using their personal cash.