An analyst does research about the put-cal

问题：

An analyst does research about the put-call parity. With respect to the put-call parity, which of the following positions is equal to a synthetic call position（）

A. Long a put, long the underlying, and short a risk-free bond.

B. Short a put, long the underlying, and short a risk-free bond.

C. Long a put, short the underlying, and long a risk-free bond.