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Solution

Cohesion means how strongly the elements of a module are related to each other.

Communicational cohesion occurs when different parts of a module operate on the same input data or produce the same output data.

Here, modules X and Y operate on the same input and output.

So, this is an example of Communicational cohesion.

Logical cohesion groups similar logical activities.

Sequential cohesion occurs when output of one part becomes input of another part.

Procedural cohesion occurs when elements follow a particular sequence.