There are two main types of steering systems used on vehicles today.They include: Select one: a. rack and pinion and parallelogram. b. parallelogram and linkage. c. rack pinion and linkage. d. linkage and tie rod.

## Step 1<br />The question is asking about the two main types of steering systems used in vehicles. The options provided are:<br />a. rack and pinion and parallelogram.<br />b. parallelogram and linkage.<br />c. rack pinion and linkage.<br />d. linkage and tie rod.<br /><br />## Step 2<br />The rack and pinion system is a type of linear actuator that is commonly used in steering systems. It consists of a circular gear (the pinion) that meshes with a linear gear (the rack). As the pinion rotates, it causes the rack to move, which in turn moves the steering linkage.<br /><br />## Step 3<br />The parallelogram system, also known as the parallelogram linkage, is another type of steering system. It uses a series of rods and links to connect the steering center link to the wheels. This system allows for a more direct transfer of power from the steering center link to the wheels.<br /><br />## Step 4<br />The other options, such as linkage and tie rod, are components of the steering system but are not considered as the main types of steering systems.