Radhika has got this fixation with cleanliness.

The word "fixation" in the above sentence means:

obsession

The word "fixation" in the sentence "Radhika has got this fixation with cleanliness" means: obsession.

(OPTION 3)

• Specialisation: This term refers to becoming highly specialized or skilled in a particular field. It doesn't capture the sense of intense focus or obsession seen in the context.

• Compulsion: Compulsion refers to an irresistible urge to perform an irrational act. While it implies a strong urge, it may not fully capture the specific sense of fixation with cleanliness.

• Obsession: This term accurately conveys an excessive and persistent focus or preoccupation with a particular thing or activity, fitting the context of the sentence.

• Focus: While "focus" can indicate attention or concentration, it may not carry the same intensity or obsession.