Sorry, I don't agree with the correctness of Answer.

We are not talking about the literal word "Non-Clinical", but how the word is used with respect to classification of Medical Specialities.

There are 8 Non-Clinical Medical Specialities; These can be further sub-divided into Pre-Clinical & Para-Clinical Specialities.

Pre-Clinical Specialities

[1] Anatomy

[2] Physiology

[3] Bio-chemistry

Para-Clinical Specialities

[4] Pathology

[5] Microbiology

[6] Pharmacology

[7] Forensic Medicine

[8] Community Medicine / SPM - Social & Preventive Medicine

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All the above branches have limited scope with respect to professional earnings.