Which one of the following does not form a method of search for clues

Which one of the following does not form a method of search for clues at scene of crime?

Spiral method
Wheel method
Strip method
Crisscross method
This question was previously asked in
UPSC CISF-AC-EXE – 2019
Common crime scene search methods include the Spiral method, Strip or Line method, Grid or Crisscross method, Zone method, and sometimes the Wheel or Ray method. However, the Wheel method (B) is often considered less systematic or effective for thorough coverage compared to the Spiral, Strip, or Grid methods, especially in large areas. While it is sometimes listed as a potential method for radiating outwards from a central point, it is less universally applied or recommended for comprehensive searches than the others listed.
While Spiral, Strip, and Crisscross (Grid) are standard and widely used crime scene search methods, the Wheel (Ray) method is less common and potentially less effective for ensuring complete coverage, leading it sometimes not to be listed as a primary method.
Each search method has its advantages and disadvantages depending on the size and type of the crime scene, the number of personnel available, and the nature of the expected evidence.