Two $20$-base-pair DNA duplexes are compared. Duplex P has $35\%$ G-C pairs and duplex Q has $65\%$ G-C pairs (A-T = 2 and G-C = 3 hydrogen bonds). Which statement is correct?

1. AQ has 53 hydrogen bonds against 47 for P, so Q melts at the higher temperature
2. BP has 53 hydrogen bonds against 47 for Q, so P melts at the higher temperature
3. CBoth have 50 hydrogen bonds, so they melt at the same temperature
4. DQ has 53 hydrogen bonds against 47 for P, but P melts at the higher temperature