correct please

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. Raman and Sita are skipping their class to sit by the lake.
  2. Raman and Sita are skipping their class and sitting by the lake.
    Which of the two sentence is more sensible and correct by grammar?
2

Both are correct.
1 gives the reason for skipping class.
2 does not give the reason for skipping class but says what they are doing instead.