Answer: From the words of Jesus Christ Himself, it is clear that the God is the Father.
1After Jesus said this, he looked toward heaven and prayed: "Father, the time has come. Glorify your Son, that your Son may glorify you. 2For you granted him authority over all people that he might give eternal life to all those you have given him. 3Now this is eternal life: that they may know you, the only true God, and Jesus Christ, whom you have sent.Christ didn't say, "that they may know US, the only true God." He didn't even say, "that they may know ME, the only true God."John 17:1-3, NIV (emphasis mine)