The question asks us to match the discoverer in List-I with their corresponding discovery in List-II.
In List-I,
- p. Jenner refers to the person who discovered vaccination
- q. Watson refers to the person who discovered the double helix structure of DNA
- r. Landsteiner refers to the person who discovered blood grouping
- s. Fleming refers to the person who discovered penicillin
In List-II,
- 1. blood grouping corresponds to r. Landsteiner
- 2. penicillin corresponds to s. Fleming
- 3. vaccination corresponds to p. Jenner
- 4. double helix corresponds to q. Watson
The correct answer is option 3: p - 3, q - 4, r - 1, s - 2.