In the following question, a part of the sentence is highlighted in bold. Choose the correct alternative that can replace the highlighted part to make the sentence grammatically correct without changing its meaning.

Our bank manager was assisting my partner to pay up a huge sum from loans we accumulated during the pandemic.

The correct answer is to pay off a huge sum of.

Explanation:
The original sentence contains two errors in the highlighted phrase "to pay up a huge sum from":

1. Phrasal Verb Error:
- "Pay up" means to hand over money under coercion or reluctantly.
- "Pay off" means to fully settle, discharge, or clear a debt or loan. In the context of clearing accumulated pandemic loans, the phrasal verb "pay off" is the correct expression to use.

2. Preposition Error:
- The preposition "from" after "a huge sum" is grammatically incorrect in this context.
- The preposition "of" should be used to link the quantity/sum to the noun it modifies, forming the correct phrase "a huge sum of loans".

Therefore, replacing the highlighted part with "to pay off a huge sum of" makes the sentence grammatically correct without altering its original meaning.

Corrected Sentence:
"Our bank manager was assisting my partner to pay off a huge sum of loans we accumulated during the pandemic."