Step 1: Look at what Swapna actually needs.
She needs affordable, dependable credit to cover cultivation costs, not just any source of money.
Step 2: Rule out the weak options.
The RBI does not lend to individual farmers, and moneylenders or traders typically charge steep interest and can trap borrowers in debt, so these are not good choices for her.
Step 3: Pick the sound option.
A nationalised bank lends at regulated, reasonable interest rates and runs proper agricultural credit schemes, making it a safe and affordable choice.
Hence, Swapna should take the loan from the nearest nationalised bank, option (B).