Question

Locard is famous for:

• A. Theory of exchange
• B. Fingerprint study
• C. Formula for estimation of stature
• D. System of personal identification using the body measurement

Answer 1

The Correct Option is A

Step 1: The question asks which contribution is attributed to Locard, a key figure in the development of forensic trace evidence.

Step 2: Locard's lasting legacy is the principle of mutual exchange of material on contact, summarised as every contact leaves a trace; this underpins the collection of hair, fibre, soil and similar transfer evidence.

Step 3: By elimination, anthropometric body measurement for identification is credited to Bertillon, fingerprint classification to Henry and Galton, and stature estimation formulae to Pearson and Trotter-Gleser, none of which were Locard's work.

Step 4: Hence the contribution belonging to Locard is the exchange principle. \[\boxed{\text{Theory of exchange (Locard's exchange principle)}}\]