The leader of the Senate is:

a. the sergeant at arms.

b. the majority party whip.

c. the majority party leader.

d. the president of the Senate.

the senate president

the usa constituion designates the vice president of the USA as the president of the senate. he is tasked with presiding over senate proceedings and has legislative rights of voting in case of a tie. The majority and minority leader are the respective leaders of their parties in their house.

The president of the senate

The leader of the senate is the president of the senate who is also the vice president of the United States. The majority leaders is the spokesman for the majority party and the minority leader for the party with minority members.