Step 1: Understanding the Concept:
Drilling machines are classified by their configuration.
The arrangement of spindles determines the type.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the types of drilling machines.
Step 3: Detailed Explanation:
A gang drilling machine has multiple single spindle columns on a common base.
They share a common work table.
Multiple spindle machines have multiple spindles on one head.
Sensitive drilling machines are for light work.
Radial drilling machines have a movable arm.
Thus, the correct answer is gang drilling machine.
Step 4: Final Answer:
The machine is known as a gang drilling machine.
Hence, the correct option is (C).