Guanine does not pair with Thymine. In a DNA strand, adenine (A) pairs with thymine (T), while guanine (G) pairs with cytosine (C). Therefore, that must mean there was a problem or a mistake with the duplication of the strand.
This is something that you have to do yourself but i suggest doing some research ^-^
Answer:
The Student 1's method would bring more accurate results.
Explanation: