In the question below four words are given in bold. These four words are may not be in their correct position. The sentence is then followed by options with the correct combination of words that should replace each other in order to make the sentence grammatically and contextually correct. Find the correct combination of the words that replace each other.

The complex incorporating (A) was developed to heuristics (B) the efficiency of the system, algorithm (C) both optimize (D) and machine learning techniques.

Correct option is D

The correct combination of the words that should replace each other is “ A-C & B-D”. The sentence thus formed would be “The complex algorithm was developed to optimize the efficiency of the system, incorporating both heuristics and machine learning techniques.”
This sentence describes the development of a complex algorithm for improving the efficiency of a system. The algorithm was created with the aim of optimizing the system's efficiency and incorporates two different approaches: heuristics and machine learning techniques.
Incorporating means including something as part of something larger.
Heuristics mean simplifying problems and avoiding cognitive overload.
Algorithm means a set of rules to be followed in calculations or other problem-solving operations.
Optimize means to make the best or most effective use of (a situation or resource).