7.
The answer is: B
Explanation
The correct option is B: on, in.
The correct pair of prepositions for the sentence is "on" and "in." Here’s the breakdown:
"On" is used with "a farm" because it typically refers to working on a piece of land or a specific location like a farm. For example, "He works on a farm."
"In" is used with "a bank" because it refers to working inside a building or a specific enclosed space. For example, "She works in a bank."
So, the complete sentence would be: "Jyoti is working on a farm, and her mother is working in a bank."