IMO, it is the problem of how you LIST thing rather than "and" or "comma" alone.
When you list only two things that are controlled by the same subject, "and" WITHOUT comma is the perfect choice as your two examples:
1) Rita is a nice gal and she is deserving for the scholarship. (Right)
And because two part: "is a nice gal" and "is deserving for the scholarship" both refers to Rita, this sentence is rewritten in the second example:
2) Rita is a nice girl and deserves scholarship (right)
However, when you list more than two things, it is common sense that you need commas to separate them.
Ex: I am a student, a man, and a child.
The first comma is a MUST. The second, however, is strongly encouraged and many consider it WRONG to exclude that comma (in GMAT sentences, I ALWAYS see the second commas).
Thus, the answer is perfect and no problem with the comma you raise.
Radhika11
Hi Experts
I have read in
MGMAT that we shouldn't use comma before 'and' if the subject of the sentences/clauses to be connected is same.
We should instead either omit the comma or use the subject again.
For example:Rita is a nice gal and she is deserving for the scholarship. (Right)
Rita is a nice girl, and deserves scholarship (wrong)
Rita is a nice girl and deserves scholarship (right)
Can someone throw light on the last option based on the above comma splice rule form
MGMAT