Select the option that can be used as a one-word substitute for the given group of words.
Treat with a vaccine, usually by injection to promote immunity against a disease

Correct option is B

The correct one-word for the given group of words is (b) Inoculate.
Inoculate means to introduce a vaccine into the body to protect it against disease. (टीका लगाना)
Example: Children are inoculated at birth against polio.
Meanings of the given other options:
· (a) Innuendo: A subtle or indirect remark usually suggesting something derogatory. (परोक्ष कटाक्ष)
· (c) Innumerate: Lacking basic knowledge of mathematics. (गणना में अयोग्य)
· (d) Innovate: To introduce new ideas or methods. (नवाचार करना)