GMAT Sentence Correction (SC) | Re: Many of the earliest known images of Hindu deities in India

Hi Shraddha,

Can you please explain a nagging issue:

1) If there is a comma separating two clauses, don't the two clauses need some sort of coordinating conjunction such as "and or but" and don't the two clauses need to be independent?

2) I eliminated A and B because the second part of the clause because it's not independent. Was that wrong?

3) What is the general rule when we have a comma with a coordinating conjunction. Conversely, what is the general rule when we have a comma