Task: Question Answering
Input (English): Question: Ribonuclease H hydrolyzes specifically: 
 Options:  <1> The DNA with DNA matching complementary sequence. <2> RNA with DNA matching of complementary sequence. <3> The RNA primer in the replication. <4> RNA without pairing with DNA of complementary sequence <5> Certain introns in the maturation process.
Output (English): 2