Match the causative agents of diseases in Column I with the year in which they were discovered in Column II.

Column I	Column II
1. Tubercle bacillus	A. 1884
2. Cholera vibrio	B. 1880
3. Typhoid bacillus	C. 1883
4. Diphtheria bacillus	D. 1882

Options:

Correct option is C

Tubercle bacillus → D (1882): Robert Koch discovered Mycobacterium tuberculosis in 1882, identifying the cause of tuberculosis.
Cholera vibrio → C (1883): Koch also discovered Vibrio cholerae in 1883 during his research in Egypt and India.
Typhoid bacillus → B (1880): Karl Eberth identified Salmonella typhi (typhoid bacillus) in 1880, later confirmed by Robert Koch.
Diphtheria bacillus → A (1884): Friedrich Loeffler discovered Corynebacterium diphtheriae in 1884 as the causative agent of diphtheria.
Correct match: 1-D, 2-C, 3-B, 4-A → Option (c).