Step 1: Look at what is being asked.
Remember the question wants the false statement. Three statements are historical facts about Marwari rise and one is not. We will work it out by sorting the choices one at a time.
Step 2: Working through the choices, part 1.
Because this is a NOT true question, we test each statement and keep the one that is false.
Step 3: Working through the choices, part 2.
Rise of the community in colonial times is a well known fact, so choice 1 is true and is rejected.
Step 4: Working through the choices, part 3.
Choice 3 says their wealth hurt British commercial expansion. In fact they worked with British firms as agents and lenders, so their wealth helped trade. This claim is false, so choice 3 is selected.
Step 5: Working through the choices, part 4.
Settling in Calcutta (choice 2) and moving into modern industry (choice 4) are also known facts, so both are rejected.
Final Answer:
Only one statement goes against history, so option 3 is the answer. \[ \boxed{\text{Option 3}} \]